Yuen Long residents have the lowest average income of the SAR's 18 districts, at $14,700 a month, according to government census figures. The highest earners are in Wan Chai, which has the highest monthly income at $25,500. The average Central and Western resident is the second highest earner at $25,200. Those in Yau Tsim Mong, Wong Tai Sin and Kwun Tong make an average of $15,000 a month. The census also showed the total population had risen to 6.78 million this year, from 6.48 million in 1996. Hong Kong Island continues to depopulate with the current level at 1.36 million, down from 1.4 million in 1997.