Key Prevalence Measures
Substance use prevalence has remained largely stable since 2013, but it remains the case that prevalence has declined considerably over the last couple of decades.
Among 13 year olds, prevalence of use across all three substances has remained unchanged since 2013, but there were some differences among 15 year olds.
Drinking in the last week remains more common than smoking regularly or having used drugs in the last month.
Figure 1 Prevalence of smoking, drinking and drug use (2015)
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