Notes:
German data are based on six regions only (Bavaria, Brandenburg, Berlin, Hesse, Mecklenburg-Western Pomerania and Thuringia).
Turkish data are based on one major city in each of six different regions (Adana, Ankara, Diyarbakir, Istanbul, Izmir and Samsun).
Spain did not participate in the ESPAD survey. The data included here are based on a Spanish survey conducted in November–December 2002. Drug prevalence questions may be considered comparable to the ESPAD questions, but other aspects of the method mean that the Spanish data are not strictly comparable.
Source:
Hibell et al., 2004