Figure 3
From: Trends in prevalence of substance use among Icelandic adolescents, 1995–2006
Annual prevalence of those admitting to ever using hashish in their lifetime among Icelandic 10th-grade students, 1995–2006. The proportions shown for each year represent responses that have been collapsed into a dichotomized variable (0 = "Never" and 1 = "Yes, at some point").