12. Trends in use of drugs in the last year by 16 to 24 year olds between 1996 and 2010/11
13. Proportion of 16 to 24 year olds reporting use of drugs (by type) in the last year
14. Last year’s use of recently classified drugs by young adults Of those who used mephedrone in the last year, 91 per cent had taken at least one other illicit drug in the last year