Among Australians aged 14 years or older who have ever used cannabis, the average age at which they first tried it has remained stable at 19 years between 2001 and 2019.

Among Australians aged 14-29 years who have ever used cannabis, the average age at which they first tried it has increased significantly over time: between 2001 and 2010 the average age of initiation was 16 years; in 2016 it increased to 17 years; and in 2019 it increased to 18 years.