Capt. John Byron visited the islands in 1764 and they were administered by Britain as part of a protectorate (1892–1916) and as part of the Gilbert and Ellice Islands colony (1916–74). The colony became self-governing in 1971, and in 1974 the Ellice Islanders voted for separate British dependency status as Tuvalu. They became fully independent in 1978 and in 1979 signed a treaty of friendship with the United States, which recognized Tuvalu's possession of four small islands formerly claimed by the United States. Ionatana Ionatana, prime minister since Mar., 1999, died in Dec., 2000; the following February, Faimalaga Luka was elected to succeed him. In 2001 the government requested help from Australia and New Zealand in resettling its citizens if global warming leads to a significant rise in ocean waters; the highest point in the country is about 16 ft (5 m) above sea level. In Dec., 2001, Luka lost a confidence vote. Koloa Talake was chosen to succeed him, but he lost his seat in the elections in July, 2002. Saufatu Sopoanga became prime minister the following month. Sopoanga lost a confidence vote two years later, and in Oct., 2004, Maatia Toafa succeeded him. Following the Aug., 2006, parliamentary elections, in which all members of the government except Toafa lost their seats, Apisai Ielemia became prime minister. Toafa again became prime minister following the Sept., 2010, elections, but his government lost a confidence vote in December; Willie Telavi was elected to succeed him. In Aug., 2013, Telavi was ousted, and Enele Sopoaga became prime minister.