National Drug Strategy Household Survey 2016: detailed findings – AIHW
...under 4 in 10 Australians either smoked daily, drank alcohol in ways that put them at risk of harm or used an illicit drug in the previous 12 months. https://www.aihw.gov.au/reports/illicit-use-of-drugs/ndshs-2016-detailed/contents/table-of-contents...