Notes:
For sources and bibliographic references, the numbering after the country name, refer to Table DUP-0.
Data between brackets refer to sample sizes and study years.
The Netherlands: The figure for ecstasy (21 %) refers to amphetamines or ecstasy; figures for heroin (4 % and 5 %) refers to heroin and opiates.
Finland: The figure for heroin (5 %) refers to opiates.
United Kingdom: The figure for cocaine (57 %) refers to cocaine and crack; the figure for heroin (60 %) refers to heroin and opiates.
For methodological details of studies, refer to Table DUP-1 in the 2006 statistical bulletin.
See also 'General notes for interpreting data' on the Explanatory notes and help page.
Sources:
Reitox National focal points. For detailed sources and bibliographic references, refer to Table DUP-0.