The Australian Bureau of Statistics (ABS) is the independent statutory agency of the Australian Government, responsible for statistical collection and analysis and for giving evidence-based advice to federal, state and territory governments. The ABS collects and analyses statistics on economic, population, environmental and social issues, publishing many on their website. The ABS also operates the national Census of Population and Housing that occurs every five years. In 1901, statistics were collected by each state and territory of Australia for their separate use. While attempts were made to coordinate collections through an annual Conference of Statisticians, it was quickly realized that a National Statistical Office would be required to develop nationally comparable statistics. The Commonwealth Bureau of Census and Statistics (CBCS) was established under the Census and Statistics Act in 1905. Sir George Knibbs was appointed as the first Commonwealth Statistician. Initially, the bureau was located in Melbourne and was attached to the Department of Home Affairs. In 1928, the bureau relocated to Canberra and in 1932 moved to the Treasury portfolio. Initially, the states maintained their own statistical offices and worked together with the CBCS to produce national data. However, some states found it difficult to resource a state statistical office to the level required for an adequate statistical service. In 1924 the Tasmanian Statistical Office transferred to the Commonwealth. On 20 August 1957, the New South Wales (NSW) Bureau of Statistics was merged into the Commonwealth Bureau. Unification of the state statistical offices with the CBCS was finally achieved in the late 1950s under the stewardship of Sir Stanley Carver, who was both NSW Statistician and Acting Commonwealth Statistician. In 1974 the CBCS was abolished and the Australian Bureau of Statistics (ABS) was established in its place. The Australian Bureau of Statistics Act established the ABS as a statutory authority in 1975, headed by the Australian Statistician and responsible to the Treasurer.