Scientology has existed in Australia since the early 1950s. The number of Scientology adherents varies depending upon the source: according to the 2011 census, it has a declining population, 2,163 members, down from 2,507 in 2006, while Scientology itself has claimed 150,000 members in Australia. The 2016 census records 1,684 people describing their religion as Scientology. It has headquarters in Sydney, Melbourne, Perth, Adelaide, and Canberra, along with a mission in Tasmania and Brisbane. The Church of Scientology Australia is the regional headquarters for the entire Asian and Pacific area.