This report is based on information provided to the EMCDDA by the EU Member States, the candidate countries Croatia and Turkey, and Norway. Statistical data reported here are for 2011, or the most recent year available. European totals and trends are based on those countries providing sufficient and relevant data for the period specified. The data analysis prioritises levels, trends and geographical distribution. The necessary technical caveats and qualifications of the data may be found
in the English language online version of this report and in the EMCDDA Statistical bulletin 2013, where information on methodology, reporting countries and years is available. In addition, the online version provides links to further resources.