Tokelau (; ; known previously as the Union Islands, and, until 1976, known officially as the Tokelau Islands) is a dependent territory of New Zealand in the southern Pacific Ocean. It consists of three tropical coral atolls: Atafu, Nukunonu, and Fakaofo. They have a combined land area of . The capital rotates yearly among the three atolls. In addition to these three, Swains Island, which forms part of the same archipelago, is the subject of an ongoing territorial dispute; it is currently administered by the United States as part of American Samoa. Tokelau lies north of the Samoan Islands, east of Tuvalu, south of the Phoenix Islands, southwest of the more distant Line Islands, and northwest of the Cook Islands. Tokelau has a population of approximately 1,500 people; it has the fourth-smallest population of any sovereign state or dependency in the world. As of the 2016 census, around 45% of its residents had been born overseas, mostly in Samoa or New Zealand. The populace has a life expectancy of 69, which is comparable to that of other Oceanian island nations. Approximately 94% of the population speak Tokelauan as their first language. Tokelau has the smallest economy of any sovereign nation, although it is a leader in renewable energy, being the first 100% solar-powered nation in the world. Tokelau is officially referred to as a nation by both the New Zealand government and the Tokelauan government. It is a free and democratic nation with elections every three years. However, in 2007, the United Nations General Assembly included Tokelau on its list of non-self-governing territories. Its inclusion on this list is controversial, as Tokelauans have twice narrowly voted against further self-determination, and the islands' small population makes the viability of self-government challenging. The basis of Tokelau's legislative, administrative and judicial systems is the Tokelau Islands Act 1948, which has been amended several times. Since 1993, the territory has annually elected its own head of government, the Ulu-o-Tokelau. Before 1993, the administrator of Tokelau was the highest official in the government and the territory was directly administered by a New Zealand government department. Etymology is a word meaning "north wind" in the native Tokelau language. The Tokelau islands were named the Union Islands and Union Group by European explorers at an earlier time. Tokelau Islands was adopted as the islands’ official name in 1946. The name was officially shortened to Tokelau on 9