Fig. 4From: Seizures of illicit substances for personal use in two Italian provinces: analysis of trends by type and purity from 2008 to 2017Percentage of seized substances by age class of the subjects. 14–24 years (n = 1523), 25–34 years (n = 1009), 35–44 years (n = 405), 45–54 years (n = 130) and 55–77 years (n = 21)Back to article page