electricity from renewable sources. Demographics Over 70% of the inhabitants live on its main island, Tongatapu. Although an increasing number of Tongans have moved into the only urban and commercial centre, Nukuʻalofa, where European and indigenous cultural and living patterns have blended, village life and kinship ties remain influential throughout the country. Despite emigration, Tonga grew in population from about 32,000 in the 1930s to more than 90,000 by 1976. Ethnic groups According to the government portal, Tongans, Polynesian by ethnicity with a mixture of Melanesian, represent more than 98% of the inhabitants. About 1.5% are mixed Tongans and the rest are European (the majority are British), mixed European, and other Pacific Islanders. In 2001, about 3,000 to 4,000 Chinese lived there, comprising 3 to 4% of the total Tongan population. The 2006 Nukuʻalofa riots mainly targeted Chinese-owned businesses, leading to the emigration of several hundred Chinese so that only about 300 remain. Languages Tongan is the official language, along with English. A Polynesian language, it is closely related to Wallisian (Uvean), Niuean, and Hawai'ian. Religion Tonga does not have an official state religion. The Constitution of Tonga (Revised 1998) provides for freedom of religion. In 1928, Queen Salote Tupou III, who was a member of the Free Wesleyan Church of Tonga, established the Free Wesleyan Church as the state religion of Tonga. The chief pastor of the Free Wesleyan Church serves as the representative of the people of Tonga and of the church at the coronation of a king or queen of Tonga, where he anoints and crowns the monarch. In opposition to the establishment of the Free Wesleyan Church as a state religion, the Church of Tonga separated from the Free Wesleyan Church in 1928. Islam in Tonga is a small minority religion in the country. Muslims in Tonga belong to Sunni denomination. Al-Khadeejah Mosque is a prominent mosque in Tonga. Everyday life is heavily influenced by Polynesian traditions and by the Christian faith; for example, all commerce and entertainment activities cease on Sunday, from the beginning of the day at midnight, to the end of the day at midnight. The constitution declares the Sabbath sacred forever. The official figures from the latest government census show that 90% of the population are affiliated with a Christian church or sect, with the four major church affiliations in the kingdom: Free Wesleyan Church of Tonga (36,592 or 36%) The Church