In recent surveys, rates of use in the last month werereported by 0.5–9% of all adults (with many countries inthe range 2–4%), by 1.5–13% of young adults (withmany countries in the range 3–8%) and by 1.2–16% of15- to 24-year-olds (with many countries in the range5–10%) (Figure 3).
Πρόσφατηχρήση (κατά το τελευταίο δωδεκάµηνο) αναφέρει piοσοστό4 έως 32%, τα δε piοσοστά κυµαίνονται στις piερισσότερεςχώρες µεταξύ 9 και 21% (38).