This 2016 National Drug Strategy Household Survey report shows that: the decline in daily smoking slowed in 2016 but improvements were seen among people living in the lowest socioeconomic area; certain groups disproportionately experience drug-related risks and recent use of illicit drugs was particularly high for people who identified as homosexual or bisexual; just 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