Figure 2From: Trends in prevalence of substance use among Icelandic adolescents, 1995–2006Annual prevalence of intoxication during the last 30 days among Icelandic 10th-grade students, 1995–2006. The proportions shown for each year represent responses that have been collapsed into a dichotomized variable (0 = "No" and 1 = "Yes, once or more often").Back to article page