Data are from the most recent national surveys available in each country (see epidemiological tables on population surveys, 2006 statistical bulletin).
The age range is from 15 to 18 to 59 to 64. Variations in age ranges may slightly influence disparities between countries.
See also 'General notes for interpreting data' on the Explanatory notes and help page.
Reitox national reports (2005), taken from population surveys reports or scientific articles.
See also standard epidemiological tables in EMCDDA statistical bulletin.