Has the average age at which Australians start to use cannabis changed over time?

Among Australians aged 14 years and older who have ever used cannabis, the average age at which they first tried it has remained stable at 19 years since 1995.

Among Australians aged 14-24 years who have ever used cannabis, the average age at which they first tried it has increased over time: between 1995 and 2010 the average age was 16 years; while in 2013 it significantly increased to 17 years.

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