Religion in Australia is diverse. The Constitution of Australia of 1901 prohibits the Commonwealth government from establishing a church or interfering with the freedom of religion; however, the Australian population is predominantly Christian. In an optional question on the 2011 Census, 61.1% of the Australian population declared some variety of Christianity. Historically the percentage has been far higher and the religious landscape of Australia is changing and diversifying.[1] Also in 2011, 22.3% of Australians stated "no religion" and a further 9.4% chose not to answer the question.[1] The remaining population is a diverse group which includes Buddhists (2.5%), Muslims (2.2%), Hindus(1.3%) and Jews (0.5%).