Has the proportion of cannabis users in Australia changed over time?

The proportion of Australians who had used cannabis in their lifetime was lowest (31%) in 1995 and highest (39%) in 1998. In 2013, 35% of Australians had used cannabis at some time in their life.

The proportion of Australians who had used cannabis in the past 12 months was lowest (9%) in 2007 and highest (18%) in 1998. In 2013, 10% of Australians had used cannabis in the past 12 months.

In 1993, 35% of Australians had used cannabis in their lifetime and 13% had used in the past 12 months. In 1995, 31% of Australians had used cannabis in their lifetime and 13% had used in the past 12 months. In 1998, 39% of Australians had used cannabis in their lifetime and 18% had used in the past 12 months. In 2001, 33% of Australians had used cannabis in their lifetime and 13% had used in the past 12 months. In 2004, 34% of Australians had used cannabis in their lifetime and 11% had used in the past 12 months. In 2007, 34% of Australians had used cannabis in their lifetime and 9% had used in the past 12 months. In 2010, 35% of Australians had used cannabis in their lifetime and 10% had used in the past 12 months. In 2013, 35% of Australians had used cannabis in their lifetime and 10% had used in the past 12 months.

Source: Australian Institute of Health and Welfare (AIHW). 2013 National Drug Strategy Household Survey.