Sometime between 1250 and 1300 CE, Polynesians settled in the islands that later were named New Zealand and developed a distinctive Māori culture. In 1642, Dutch explorer Abel Tasman became the first European to sight New Zealand. In 1840, representatives of Britain and Māori chiefs signed the Treaty of Waitangi, which declared British sovereignty over the islands. In 1841, New Zealand became a colony within the British Empire and in 1907 it became a Dominion. Today, the majority of New Zealand's population of 4.7 million is of European descent; the indigenous Māori are the largest minority, followed by Asians and Pacific Islanders. Reflecting this, New Zealand's culture is mainly derived from Māori and early British settlers, with recent broadening arising from increased immigration. The official languages are English, Māori and New Zealand Sign Language, with English predominant.
New Zealand is a developed country and ranks highly in international comparisons of national performance, such as health, education, economic freedom and quality of life. Since the 1980s, New Zealand has transformed from an agrarian, regulated economy to a market economy. Nationally, legislative authority is vested in an elected, unicameral Parliament, while executive political power is exercised by the Cabinet, led by the Prime Minister, who is currently Jacinda Ardern. Queen Elizabeth II is the country's head of state and is represented by a governor-general, currently Dame Patsy Reddy. In addition, New Zealand is organised into 11 regional councils and 67 territorial authorities for local government purposes. The Realm of New Zealand also includes Tokelau ; the Cook Islands and Niue ; and the Ross Dependency, which is New Zealand's territorial claim in Antarctica. New Zealand is a member of the United Nations, Commonwealth of Nations, ANZUS, Organisation for Economic Co-operation and Development, Pacific Islands Forum, and Asia-Pacific Economic Cooperation.
Dutch explorer Abel Tasman sighted New Zealand in 1642 and called it Staten Landt, supposing it was connected to a landmass of the same name at the southern tip of South America. In 1645, Dutch cartographers renamed the land Nova Zeelandia after the Dutch province of Zeeland. British explorer James Cook subsequently anglicised the name to New Zealand.
Aotearoa (often translated as "land of the long white cloud") is the current Māori name for New Zealand. It is unknown whether Māori had a name for the whole country before the arrival of Europeans, with Aotearoa originally referring to just the North Island. Māori had several traditional names for the two main islands, including Te Ika-a-Māui (the fish of Māui) for the North Island and Te Waipounamu (the waters of greenstone) or Te Waka o Aoraki (the canoe of Aoraki) for the South Island. Early European maps labelled the islands North (North Island), Middle (South Island) and South (Stewart Island / Rakiura). In 1830, maps began to use North and South to distinguish the two largest islands and by 1907, this was the accepted norm. The New Zealand Geographic Board discovered in 2009 that the names of the North Island and South Island had never been formalised, and names and alternative names were formalised in 2013. This set the names as North Island or Te Ika-a-Māui, and South Island or Te Waipounamu. For each island, either its English or Māori name can be used, or both can be used together.
New Zealand was one of the last major landmasses settled by humans. Radiocarbon dating, evidence of deforestation and mitochondrial DNA variability within Māori populations suggest New Zealand was first settled by Eastern Polynesians between 1250 and 1300, concluding a long series of voyages through the southern Pacific islands. Over the centuries that followed, these settlers developed a distinct culture now known as Māori. The population was divided into iwi (tribes) and hapū (subtribes) who would sometimes cooperate, sometimes compete and sometimes fight against each other. At some point a group of Māori migrated to Rēkohu, now known as the Chatham Islands, where they developed their distinct Moriori culture. The Moriori population was all but wiped out between 1835 and 1862, largely because of Taranaki Māori invasion and enslavement in the 1830s, although European diseases also contributed. In 1862 only 101 survived, and the last known full-blooded Moriori died in 1933.
The first Europeans known to have reached New Zealand were Dutch explorer Abel Tasman and his crew in 1642. In a hostile encounter, four crew members were killed and at least one Māori was hit by canister shot. Europeans did not revisit New Zealand until 1769 when British explorer James Cook mapped almost the entire coastline. Following Cook, New Zealand was visited by numerous European and North American whaling, sealing and trading ships. They traded European food, metal tools, weapons and other goods for timber, Māori food, artefacts and water. The introduction of the potato and the musket transformed Māori agriculture and warfare. Potatoes provided a reliable food surplus, which enabled longer and more sustained military campaigns. The resulting intertribal Musket Wars encompassed over 600 battles between 1801 and 1840, killing 30,000–40,000 Māori. From the early 19th century, Christian missionaries began to settle New Zealand, eventually converting most of the Māori population. The Māori population declined to around 40% of its pre-contact level during the 19th century; introduced diseases were the major factor.
In 1788 Captain Arthur Phillip assumed the position of Governor of the new British colony of New South Wales which according to his commission included New Zealand. The British Government appointed James Busby as British Resident to New Zealand in 1832 following a petition from northern Māori. In 1835, following an announcement of impending French settlement by Charles de Thierry, the nebulous United Tribes of New Zealand sent a Declaration of Independence to King William IV of the United Kingdom asking for protection. Ongoing unrest, the proposed settlement of New Zealand by the New Zealand Company (which had already sent its first ship of surveyors to buy land from Māori) and the dubious legal standing of the Declaration of Independence prompted the Colonial Office to send Captain William Hobson to claim sovereignty for the United Kingdom and negotiate a treaty with the Māori. The Treaty of Waitangi was first signed in the Bay of Islands on 6 February 1840. In response to the New Zealand Company's attempts to establish an independent settlement in Wellington and French settlers purchasing land in Akaroa, Hobson declared British sovereignty over all of New Zealand on 21 May 1840, even though copies of the Treaty were still circulating throughout the country for Māori to sign. With the signing of the Treaty and declaration of sovereignty the number of immigrants, particularly from the United Kingdom, began to increase.
New Zealand, still part of the colony of New South Wales, became a separate Colony of New Zealand on 1 July 1841. The colony gained a representative government in 1852 and the first Parliament met in 1854. In 1856 the colony effectively became self-governing, gaining responsibility over all domestic matters other than native policy. (Control over native policy was granted in the mid-1860s.) Following concerns that the South Island might form a separate colony, premier Alfred Domett moved a resolution to transfer the capital from Auckland to a locality near the Cook Strait. Wellington was chosen for its central location, with Parliament officially sitting there for the first time in 1865. As immigrant numbers increased, conflicts over land led to the New Zealand Wars of the 1860s and 1870s, resulting in the loss and confiscation of much Māori land.
In 1891 the Liberal Party, led by John Ballance, came to power as the first organised political party. The Liberal Government, later led by Richard Seddon, passed many important social and economic measures. In 1893 New Zealand was the first nation in the world to grant all women the right to vote and in 1894 pioneered the adoption of compulsory arbitration between employers and unions.
In 1907, at the request of the New Zealand Parliament, King Edward VII proclaimed New Zealand a Dominion within the British Empire, reflecting its self-governing status. In 1947 the country adopted the Statute of Westminster, confirming that the British Parliament could no longer legislate for New Zealand without the consent of New Zealand.
Early in the 20th century, New Zealand was involved in world affairs, fighting in the First and Second World Wars and suffering through the Great Depression. The depression led to the election of the First Labour Government and the establishment of a comprehensive welfare state and a protectionist economy. New Zealand experienced increasing prosperity following the Second World War and Māori began to leave their traditional rural life and move to the cities in search of work. A Māori protest movement developed, which criticised Eurocentrism and worked for greater recognition of Māori culture and of the Treaty of Waitangi. In 1975, a Waitangi Tribunal was set up to investigate alleged breaches of the Treaty, and it was enabled to investigate historic grievances in 1985. The government has negotiated settlements of these grievances with many iwi, although Māori claims to the foreshore and seabed have proved controversial in the 2000s.
New Zealand is a constitutional monarchy with a parliamentary democracy, although its constitution is not codified. Elizabeth II is the Queen of New Zealand and the head of state. The Queen is represented by the Governor-General, whom she appoints on the advice of the Prime Minister. The Governor-General can exercise the Crown's prerogative powers, such as reviewing cases of injustice and making appointments of ministers, ambassadors and other key public officials, and in rare situations, the reserve powers (e.g. the power to dissolve Parliament or refuse the Royal Assent of a bill into law). The powers of the Queen and the Governor-General are limited by constitutional constraints and they cannot normally be exercised without the advice of ministers.
The New Zealand Parliament holds legislative power and consists of the Queen and the House of Representatives. It also included an upper house, the Legislative Council, until this was abolished in 1950. The supremacy of Parliament, over the Crown and other government institutions, was established in England by the Bill of Rights 1689 and has been ratified as law in New Zealand. The House of Representatives is democratically elected and a government is formed from the party or coalition with the majority of seats. If no majority is formed, a minority government can be formed if support from other parties during confidence and supply votes is assured. The Governor-General appoints ministers under advice from the Prime Minister, who is by convention the parliamentary leader of the governing party or coalition. Cabinet, formed by ministers and led by the Prime Minister, is the highest policy-making body in government and responsible for deciding significant government actions. Members of Cabinet make major decisions collectively, and are therefore collectively responsible for the consequences of these decisions.
A parliamentary general election must be called no later than three years after the previous election. Almost all general elections between 1853 and 1993 were held under the first-past-the-post voting system. Since the 1996 election, a form of proportional representation called mixed-member proportional (MMP) has been used. Under the MMP system, each person has two votes; one is for electorate seats (including some reserved for Māori), and the other is for a party. Since the 2014 election, there have been 71 electorates (which includes 7 Māori electorates), and the remaining 49 seats are assigned so that representation in parliament reflects the party vote, although a party has to win one electorate or 5% of the total party vote before it is eligible for these seats.
Elections since the 1930s have been dominated by two political parties, National and Labour. Between March 2005 and August 2006, New Zealand became the first country in the world in which all the highest offices in the land—Head of State, Governor-General, Prime Minister, Speaker and Chief Justice—were occupied simultaneously by women. The current Prime Minister is Jacinda Ardern, who has been in office since 26 October 2017.
New Zealand's judiciary, headed by the Chief Justice, includes the Supreme Court, Court of Appeal, the High Court, and subordinate courts. Judges and judicial officers are appointed non-politically and under strict rules regarding tenure to help maintain judicial independence. This theoretically allows the judiciary to interpret the law based solely on the legislation enacted by Parliament without other influences on their decisions.
New Zealand is identified as one of the world's most stable and well-governed states, with high government transparency and among the lowest perceived levels of corruption. The country rates highly for civic participation in the political process, with 77% voter turnout during recent elections, compared to an OECD average of 68%.
Early colonial New Zealand allowed the British Government to determine external trade and be responsible for foreign policy. The 1923 and 1926 Imperial Conferences decided that New Zealand should be allowed to negotiate its own political treaties and the first commercial treaty was ratified in 1928 with Japan. On 3 September 1939 New Zealand allied itself with Britain and declared war on Germany with Prime Minister Michael Joseph Savage proclaiming, "Where she goes, we go; where she stands, we stand."
In 1951 the United Kingdom became increasingly focused on its European interests, while New Zealand joined Australia and the United States in the ANZUS security treaty. The influence of the United States on New Zealand weakened following protests over the Vietnam War, the refusal of the United States to admonish France after the sinking of the Rainbow Warrior, disagreements over environmental and agricultural trade issues and New Zealand's nuclear-free policy. Despite the United States' suspension of ANZUS obligations the treaty remained in effect between New Zealand and Australia, whose foreign policy has followed a similar historical trend. Close political contact is maintained between the two countries, with free trade agreements and travel arrangements that allow citizens to visit, live and work in both countries without restrictions. In 2013 there were about 650,000 New Zealand citizens living in Australia, which is equivalent to 15% of the population of New Zealand.
New Zealand has a strong presence among the Pacific Island countries. A large proportion of New Zealand's aid goes to these countries and many Pacific people migrate to New Zealand for employment. Permanent migration is regulated under the 1970 Samoan Quota Scheme and the 2002 Pacific Access Category, which allow up to 1,100 Samoan nationals and up to 750 other Pacific Islanders respectively to become permanent New Zealand residents each year. A seasonal workers scheme for temporary migration was introduced in 2007 and in 2009 about 8,000 Pacific Islanders were employed under it. New Zealand is involved in the Pacific Islands Forum, Asia-Pacific Economic Cooperation and the Association of Southeast Asian Nations Regional Forum (including the East Asia Summit). New Zealand is a member of the United Nations, the Commonwealth of Nations and the Organisation for Economic Co-operation and Development (OECD), and participates in the Five Power Defence Arrangements.
The New Zealand Defence Force consists of three services: the New Zealand Army; the Royal New Zealand Air Force; and the Royal New Zealand Navy. New Zealand's national defence needs are modest, since a direct attack is unlikely. However, its military has had a global presence. The country fought in both world wars, with notable campaigns in Gallipoli, Crete, El Alamein and Cassino. The Gallipoli campaign played an important part in fostering New Zealand's national identity and strengthened the ANZAC tradition it shares with Australia.
In addition to Vietnam and the two world wars, New Zealand fought in the Second Boer War, the Korean War, the Malayan Emergency, the Gulf War and the Afghanistan War. It has contributed forces to several regional and global peacekeeping missions, such as those in Cyprus, Somalia, Bosnia and Herzegovina, the Sinai, Angola, Cambodia, the Iran–Iraq border, Bougainville, East Timor, and the Solomon Islands.
The early European settlers divided New Zealand into provinces, which had a degree of autonomy. Because of financial pressures and the desire to consolidate railways, education, land sales and other policies, government was centralised and the provinces were abolished in 1876. The provinces are remembered in regional public holidays and sporting rivalries.
Since 1876, various councils have administered local areas under legislation determined by the central government. In 1989, the government reorganised local government into the current two-tier structure of regional councils and territorial authorities. The 249 municipalities that existed in 1975 have now been consolidated into 67 territorial authorities and 11 regional councils. The regional councils' role is to regulate "the natural environment with particular emphasis on resource management", while territorial authorities are responsible for sewage, water, local roads, building consents and other local matters. Five of the territorial councils are unitary authorities and also act as regional councils. The territorial authorities consist of 13 city councils, 53 district councils, and the Chatham Islands Council. While officially the Chatham Islands Council is not a unitary authority, it undertakes many functions of a regional council.
New Zealand is one of 16 realms within the Commonwealth. The Realm of New Zealand is the entire area over which the Queen of New Zealand is sovereign, and comprises New Zealand, Tokelau, the Ross Dependency, the Cook Islands and Niue. The Cook Islands and Niue are self-governing states in free association with New Zealand. The New Zealand Parliament cannot pass legislation for these countries, but with their consent can act on behalf of them in foreign affairs and defence. Tokelau is a non-self-governing territory, but is administered by a council of three elders (one from each Tokelauan atoll). The Ross Dependency is New Zealand's territorial claim in Antarctica, where it operates the Scott Base research facility. New Zealand nationality law treats all parts of the realm equally, so most people born in New Zealand, the Cook Islands, Niue, Tokelau and the Ross Dependency are New Zealand citizens.
New Zealand is located near the centre of the water hemisphere and is made up of two main islands and a number of smaller islands. The two main islands (the North Island, or Te Ika-a-Māui, and the South Island, or Te Waipounamu) are separated by Cook Strait, 22 kilometres (14 mi) wide at its narrowest point. Besides the North and South Islands, the five largest inhabited islands are Stewart Island, Chatham Island, Great Barrier Island (in the Hauraki Gulf), d'Urville Island (in the Marlborough Sounds) and Waiheke Island (about 22 km (14 mi) from central Auckland).
New Zealand is long and narrow (over 1,600 kilometres (990 mi) along its north-north-east axis with a maximum width of 400 kilometres (250 mi)), with about 15,000 km (9,300 mi) of coastline and a total land area of 268,000 square kilometres (103,500 sq mi). Because of its far-flung outlying islands and long coastline, the country has extensive marine resources. Its exclusive economic zone is one of the largest in the world, covering more than 15 times its land area.
The South Island is the largest landmass of New Zealand and is the 12th largest island in the world. It is divided along its length by the Southern Alps. There are 18 peaks over 3,000 metres (9,800 ft), the highest of which is Aoraki / Mount Cook at 3,754 metres (12,316 ft). Fiordland's steep mountains and deep fiords record the extensive ice age glaciation of this south-western corner of the South Island. The North Island is the 14th largest island in the world and is less mountainous but is marked by volcanism. The highly active Taupo Volcanic Zone has formed a large volcanic plateau, punctuated by the North Island's highest mountain, Mount Ruapehu (2,797 metres (9,177 ft)). The plateau also hosts the country's largest lake, Lake Taupo, nestled in the caldera of one of the world's most active supervolcanoes.
The country owes its varied topography, and perhaps even its emergence above the waves, to the dynamic boundary it straddles between the Pacific and Indo-Australian Plates. New Zealand is part of Zealandia, a microcontinent nearly half the size of Australia that gradually submerged after breaking away from the Gondwanan supercontinent. About 25 million years ago, a shift in plate tectonic movements began to contort and crumple the region. This is now most evident in the Southern Alps, formed by compression of the crust beside the Alpine Fault. Elsewhere the plate boundary involves the subduction of one plate under the other, producing the Puysegur Trench to the south, the Hikurangi Trench east of the North Island, and the Kermadec and Tonga Trenches further north.
New Zealand is part of Australasia, and also forms the south-western extremity of Polynesia. The term Oceania is often used to denote the region encompassing the Australian continent, New Zealand and various islands in the Pacific Ocean that are not included in the seven-continent model.
New Zealand's climate is predominantly temperate maritime (Köppen: Cfb) with mean annual temperatures ranging from 10 °C (50 °F) in the south to 16 °C (61 °F) in the north. Historical maxima and minima are 42.4 °C (108.32 °F) in Rangiora, Canterbury and −25.6 °C (−14.08 °F) in Ranfurly, Otago. Conditions vary sharply across regions from extremely wet on the West Coast of the South Island to almost semi-arid in Central Otago and the Mackenzie Basin of inland Canterbury and subtropical in Northland. Of the seven largest cities, Christchurch is the driest, receiving on average only 640 millimetres (25 in) of rain per year and Wellington the wettest, receiving almost twice that amount. Auckland, Wellington and Christchurch all receive a yearly average of more than 2,000 hours of sunshine. The southern and south-western parts of the South Island have a cooler and cloudier climate, with around 1,400–1,600 hours; the northern and north-eastern parts of the South Island are the sunniest areas of the country and receive about 2,400–2,500 hours. The general snow season is early June until early October, though cold snaps can occur outside this season. Snowfall is common in the eastern and southern parts of the South Island and mountain areas across the country.
The table below lists climate normals for the warmest and coldest months in New Zealand's six largest cities. North Island cities are generally warmest in February. South Island cities are warmest in January.
New Zealand's geographic isolation for 80 million years and island biogeography has influenced evolution of the country's species of animals, fungi and plants. Physical isolation has not caused biological isolation, and this has resulted in a dynamic evolutionary ecology with examples of very distinctive plants and animals as well as populations of widespread species. About 82% of New Zealand's indigenous vascular plants are endemic, covering 1,944 species across 65 genera and includes a single endemic family. The number of fungi recorded from New Zealand, including lichen-forming species, is not known, nor is the proportion of those fungi which are endemic, but one estimate suggests there are about 2,300 species of lichen-forming fungi in New Zealand and 40% of these are endemic. The two main types of forest are those dominated by broadleaf trees with emergent podocarps, or by southern beech in cooler climates. The remaining vegetation types consist of grasslands, the majority of which are tussock.
Before the arrival of humans, an estimated 80% of the land was covered in forest, with only high alpine, wet, infertile and volcanic areas without trees. Massive deforestation occurred after humans arrived, with around half the forest cover lost to fire after Polynesian settlement. Much of the remaining forest fell after European settlement, being logged or cleared to make room for pastoral farming, leaving forest occupying only 23% of the land.
The forests were dominated by birds, and the lack of mammalian predators led to some like the kiwi, kakapo, weka and takahē evolving flightlessness. The arrival of humans, associated changes to habitat, and the introduction of rats, ferrets and other mammals led to the extinction of many bird species, including large birds like the moa and Haast's eagle.
Other indigenous animals are represented by reptiles (tuatara, skinks and geckos), frogs, spiders, insects (weta) and snails. Some, such as the tuatara, are so unique that they have been called living fossils. Three species of bats (one since extinct) were the only sign of native land mammals in New Zealand until the 2006 discovery of bones from a unique, mouse-sized land mammal at least 16 million years old. Marine mammals however are abundant, with almost half the world's cetaceans (whales, dolphins, and porpoises) and large numbers of fur seals reported in New Zealand waters. Many seabirds breed in New Zealand, a third of them unique to the country. More penguin species are found in New Zealand than in any other country.
Since human arrival, almost half of the country's vertebrate species have become extinct, including at least fifty-one birds, three frogs, three lizards, one freshwater fish, and one bat. Others are endangered or have had their range severely reduced. However, New Zealand conservationists have pioneered several methods to help threatened wildlife recover, including island sanctuaries, pest control, wildlife translocation, fostering, and ecological restoration of islands and other selected areas.
New Zealand has a high-income economy with a nominal gross domestic product (GDP) per capita of US$36,254. The currency is the New Zealand dollar, informally known as the "Kiwi dollar"; it also circulates in the Cook Islands (see Cook Islands dollar), Niue, Tokelau, and the Pitcairn Islands. New Zealand was ranked 13th in the 2016 Human Development Index and third in the 2016 Index of Economic Freedom.
Historically, extractive industries have contributed strongly to New Zealand's economy, focussing at different times on sealing, whaling, flax, gold, kauri gum, and native timber. With the development of refrigerated shipping in the 1880s meat and dairy products were exported to Britain, a trade which provided the basis for strong economic growth in New Zealand. High demand for agricultural products from the United Kingdom and the United States helped New Zealanders achieve higher living standards than both Australia and Western Europe in the 1950s and 1960s. In 1973, New Zealand's export market was reduced when the United Kingdom joined the European Community and other compounding factors, such as the 1973 oil and 1979 energy crisis, led to a severe economic depression. Living standards in New Zealand fell behind those of Australia and Western Europe, and by 1982 New Zealand had the lowest per-capita income of all the developed nations surveyed by the World Bank. In the mid-1980s New Zealand deregulated its agricultural sector by phasing out subsidies over a three-year period. Since 1984, successive governments engaged in major macroeconomic restructuring (known first as Rogernomics and then Ruthanasia), rapidly transforming New Zealand from a protected and highly regulated economy to a liberalised free trade economy.
Unemployment peaked above 10% in 1991 and 1992, following the 1987 share market crash, but eventually fell to a record low (since 1986) of 3.7% in 2007 (ranking third from twenty-seven comparable OECD nations). However, the global financial crisis that followed had a major impact on New Zealand, with the GDP shrinking for five consecutive quarters, the longest recession in over thirty years, and unemployment rising back to 7% in late 2009. Unemployment rates for different age groups follow similar trends, but are consistently higher among youth. In the December 2014 quarter, the general unemployment rate was around 5.8%, while the unemployment rate for youth aged 15 to 21 was 15.6%. New Zealand has experienced a series of "brain drains" since the 1970s that still continue today. Nearly one quarter of highly skilled workers live overseas, mostly in Australia and Britain, which is the largest proportion from any developed nation. In recent years, however, a "brain gain" has brought in educated professionals from Europe and less developed countries.
New Zealand is heavily dependent on international trade, particularly in agricultural products. Exports account for 24% of its output, making New Zealand vulnerable to international commodity prices and global economic slowdowns. Food products made up 55% of the value of all the country's exports in 2014; wood was the second largest earner (7%). Its major export partners are Australia, United States, Japan, China, and the United Kingdom. On 7 April 2008, New Zealand and China signed the New Zealand–China Free Trade Agreement, the first such agreement China has signed with a developed country. The service sector is the largest sector in the economy, followed by manufacturing and construction and then farming and raw material extraction. Tourism plays a significant role in the economy, contributing $12.9 billion (or 5.6%) to New Zealand's total GDP and supporting 7.5% of the total workforce in 2016. International visitor arrivals are expected to increase at a rate of 5.4% annually up to 2022.
Wool was New Zealand's major agricultural export during the late 19th century. Even as late as the 1960s it made up over a third of all export revenues, but since then its price has steadily dropped relative to other commodities and wool is no longer profitable for many farmers. In contrast dairy farming increased, with the number of dairy cows doubling between 1990 and 2007, to become New Zealand's largest export earner. In the year to June 2009, dairy products accounted for 21% ($9.1 billion) of total merchandise exports, and the country's largest company, Fonterra, controls almost one-third of the international dairy trade. Other agricultural exports in 2009 were meat 13.2%, wool 6.3%, fruit 3.5% and fishing 3.3%. New Zealand's wine industry has followed a similar trend to dairy, the number of vineyards doubling over the same period, overtaking wool exports for the first time in 2007.
In 2015, renewable energy, primarily geothermal and hydroelectric power, generated 40.1% of New Zealand's gross energy supply. Geothermal power alone accounted for 22% of New Zealand's energy in 2015.
The provision of water supply and sanitation is generally of good quality. Regional authorities provide water abstraction, treatment and distribution infrastructure to most developed areas.
New Zealand's transport network comprises 94,000 kilometres (58,410 mi) of roads, including 199 kilometres (124 mi) of motorways, and 4,128 kilometres (2,565 mi) of railway lines. Most major cities and towns are linked by bus services, although the private car is the predominant mode of transport. The railways were privatised in 1993, but were re-nationalised by the government in stages between 2004 and 2008. The state-owned enterprise KiwiRail now operates the railways, with the exception of commuter services in Auckland and Wellington which are operated by Transdev and Metlink, respectively. Railways run the length of the country, although most lines now carry freight rather than passengers. Most international visitors arrive via air and New Zealand has six international airports, but currently only the Auckland and Christchurch airports connect directly with countries other than Australia or Fiji.
The New Zealand Post Office had a monopoly over telecommunications until 1987 when Telecom New Zealand was formed, initially as a state-owned enterprise and then privatised in 1990. Chorus, which was split from Telecom (now Spark) in 2011, still owns the majority of the telecommunications infrastructure, but competition from other providers has increased. As of 2016, the United Nations International Telecommunication Union ranks New Zealand 13th in the development of information and communications infrastructure.
In June 2016, the population of New Zealand was estimated at 4.69 million and was increasing at a rate of about 2.1% per year. New Zealand is a predominantly urban country, with 73.0% of the population living in the seventeen main urban areas (i.e. population 30,000 or greater) and 53.8% living in the four largest cities of Auckland, Christchurch, Wellington, and Hamilton. New Zealand cities generally rank highly on international livability measures. For instance, in 2016 Auckland was ranked the world's third most liveable city and Wellington the twelfth by the Mercer Quality of Living Survey.
Life expectancy for New Zealanders in 2012 was 84 years for females, and 80.2 years for males. Life expectancy at birth is forecast to increase from 80 years to 85 years in 2050 and infant mortality is expected to decline. New Zealand's fertility rate of 2.1 is relatively high for a developed country, and natural births account for a significant proportion of population growth. Consequently, the country has a young population compared to most industrialised nations, with 20% of New Zealanders being 14 years old or younger. By 2050 the population is forecast to reach 5.3 million, the median age to rise from 36 years to 43 years and the percentage of people 60 years of age and older to rise from 18% to 29%. In 2008, the leading cause of premature death was cancer, at 29.8%, followed by ischaemic heart disease, 19.7%, and then cerebrovascular disease, 9.2%.