Substance Frequency of substance abuse In the last month In the last year More than a year Never Cannabis 9.6% 4.0% 6.3% 80.1% Inhalants 2.7% 1.6% 4.1% 91.6% Ecstasy 2.1% 0.9% 3.0% 94.0% Anabolic steroids 2.1% 0.2% 0.7% 97.0% Magic mushrooms 2.1% 0.5% 1.1% 96.3% Heroin 0.5% 0.0% 0.5% 99.0% Amphetamines 2.5% 0.7% 0.7% 96.1% Ketamine 2.1% 0.0% 0.5% 97.4% LSD 2.3% 0.9% 1.4% 95.4% Cocaine 4.4% 1.6% 1.8% 92.2% GHB 1.1% 0.0% 0.0% 98.9% Tranquillisers 3.4% 1.4% 1.8% 93.4% Ritalin 1.1% 0.0% 0.0% 98.9%