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The demographics of Nauru, an island country in the Pacific Ocean, are known through national censuses, which have been analysed by various statistical bureaus since the 1920s. The Nauru Bureau of Statistics have conducted this task since 1977—the first census since Nauru gained independence in 1968. The most recent census of Nauru was in 2011, when population had reached ten thousand. The population density is 478 inhabitants per square kilometre (185 per square mile), and the overall life expectancy is 59.7 years. The population rose steadily from the 1960s until 2006 when the Government of Nauru repatriated thousands of Tuvaluan and I-Kiribati workers from the country. Since 1992, Nauru's birth rate has exceeded its death rate; the natural growth rate is positive. In terms of age structure, the population is dominated by the 15–64-year-old segment (65.6%). The median age of the population is 21.5, and the estimated gender ratio of the population is 0.91 males per one female. Nauru is inhabited mostly by Nauruans (93.6%), while minorities include I-Kiribati (1.8%), Chinese (1.5%) and other (3.1%). The demographic history of Nauru is marked by several migrations: the area was first inhabited by Micronesian people about 3,000 years ago. The first European to find the island was John Fearn in 1798. Then, the country was annexed by Germany in the 1888. The next was when Japanese occupied the island during World War II in the 1942. During this time, the Japanese deported several thousands of Nauruans to other islands. In the 1960s, the country gained independence, where the percentage of Nauruans started to increase. The most recent demographic switch was in the 2000s, when the government repatriated several non-Nauruan population from the country. The Nauruan language is the official language of Nauru, but English is often used in the country. Nauruan is declared as the primary language of 95.3% of the population. The 2011 census revealed that 66.0% of the population spoke English and 11.9% another language. The main religions of Nauru are Nauru Congregational Church (35.71%) and Roman Catholic (32.96%). The literacy rate in Nauru is 96.5%. The proportion of the country's population aged 15 and over attaining academic degrees is one of the lowest in the world, reaching 7.9% in 2011. An estimated 10.7% of the gross domestic product (GDP) is spent on education. Nauru has a universal health care system, and in 2012, an estimated 7.5% of its GDP was spent on healthcare. Nauru has the highest obesity ranking in the world; 97 per cent of men and 93 per cent of women are obese. In 2006, the average net monthly income was A$2,597 (A$ in 2014). The most significant sources of employment are phosphate mining, banking industries, and various coconut products. In 2011, the unemployment rate was 23%. The 2011 census enumerated 1,647 total households, averaging 6.0 persons per house. Average urbanisation rate in Nauru is 100%. == Population == With a population of ten thousand in 2011, Nauru ranks around 230th in the world by population. Its population density is 478 inhabitants per square kilometre (185 per square mile). The overall life expectancy in Nauru at birth is 59.7 years. The total fertility rate of 3.70 children per mother is one of the highest in the Oceania. Future estimates are indifferent; the Central Intelligence Agency's ''World Factbook'' estimated the population of Nauru would decrease to approximately 9,400 in 2014, the United Nations projects the population will stay around 10,000 in the 2020s, and the Nauru Bureau of Statistics estimates the population will increase to 20,000 in 2038. In Nauru's history, there have been six major demographics changes. The island was first inhabited by Micronesian people roughly 3,000 years ago. The first European to find the island was John Fearn in 1798. In 1888, the country was annexed by Germany. The next demographic change came when Japanese occupied the island during World War II in the 1940s. During this time, the Japanese deported several thousands of Nauruans to other islands. The next major demographic change was in the 1960s; the country gained independence, where the percentage of Nauruans started to increase. The last major demographics change was in 2006 when the Government of Nauru repatriated almost all of the remaining Tuvaluan and I-Kiribati workers, following large scale reduction from the Republic of Nauru Phosphate Corporation (RONPhos) and government workers. The census of 2006 stated 9,233 people were in Nauru: down 2.13% per year from the previous census of 2002.〔 From 2002–11, there has been negative net migration, with an annual negative 109 net immigrants from 2006–11. In 2009 there were 1,820 arrivals and 1,736 departures, for a positive rate of 84 immigrants. This was the first time since collecting data in 2002, there was a positive rate.〔http://www.spc.int/prism/nauru/〕 Data on arrivals and departures collected by the Nauruan Customs and Immigration Office is not available, so specific immigration data is unavailable. As of the 2011 census, 57% of the population over 15 years old were legally or ''de facto'' married, 35% were never married, while 7% were either widowed, separated, or divorced. There are 1,647 households in Nauru, making an average household size of 6.0 persons per household.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Demographics of Nauru」の詳細全文を読む スポンサード リンク
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