Trends In Illicit Substance Use By Students and Young People In the European Union According to ESPAD
"Generally, between 1995 and 2011, there was an increase in the lifetime prevalence of illicit drug use, most of which occurred between 1995 and 1999. Since 2011, the prevalence has started to decrease slowly. The lifetime prevalence of illicit drug use among boys and girls follows a parallel trend, with the rate among girls being about 5-6 percentage points lower than that among boys (Figure 21).