Qatar population was 2.6 million: 313,000 Qatari citizens and 2.3 million expatriates. Islam is the official religion of Qatar. The country has the highest per capita income in the world. Qatar is classified by the UN as a country of very high human development and is widely regarded as the most advanced Arab state for human development. Qatar is a high-income economy, backed by the world's third-largest natural gas reserves and oil reserves. Qatar has been ruled by the House of Thani since Mohammed bin Thani signed a treaty with the British in 1868 that recognised its separate status. Following Ottoman
Surat Thani was impressed with the Indian city. On 21 December 1930 Surat Thani became a sanitary district ("sukhaphiban"), which was upgraded to a town ("thesaban mueang") on 7 December 1935, with a municipal area of 2.67 km². The area of the municipality was enlarged to 6.95 km² on 14 October 1958, and on 22 December 1994 it was further enlarged to 68.97 km². On 4 May 2007, the town was upgraded to city status ("thesaban nakhon"). Since 1969 Surat Thani is the seat of the Roman Catholic Diocese of Surat Thani, responsible for about 6,000 Catholics in southern Thailand. Surat Thani