"The consumption of cannabis, cocaine and ecstasy has increased in the past ten years. At present, around 20% of the population over 15 years of age have consumed cannabis (24% of men and 15% of women). Experience of consumption has also risen in the case of cocaine (from 1.6% to 2.8%) and ecstasy (from 1.0% to 1.8%)."
Swiss Federal Office of Public Health. "The Challenge of Addiction - Foundations for a Future Oriented Policy on Addiction in Switzerland." May 2010.