The Australian National Household Survey of 2001 [Australian Institute of Health and Welfare (2002). 2001 National Drug Stategy Household Survey: first results. (Drug Statistics Series, no. 9). AIHW cat no. PHE 35. Canberra: AIHW.] showed that cannabis use in Australia is rarely used without other drugs. 95% of cannabis users also drank alcohol; 26% took amphetamines; 19% took ecstasy and only 2.7% reported not having used any other drug with cannabis