Australia has no state religion; Section 116 of the Australian Constitution prohibits the federal government from making any law to establish any religion, impose any religious observance, or prohibit the free exercise of any religion. In the 2016 census, 52.1% of Australians were counted as Christian, including 22.6% as Catholic and 13.3% as Anglican; 30.1% of the population reported having "no religion"; 8.2% identify with non-Christian religions, the largest of these being Islam (2.6%), followed by Buddhism (2.4%), Hinduism (1.9%), Sikhism (0.5%) and Judaism (0.4%). The remaining 9.7% of the population did not provide an adequate answer. Those who reported having no religion increased conspicuously from 19% in 2006 to 22% in 2011 to 30.1% in 2016.