Table 42b. Lifetime abstinence from various substances by gender. 2015. Percentages.

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a 'Without a doctor's prescription'.
b Includes cannabis, amphetamines, cocaine, crack, ecstasy, LSD or other hallucinogens, heroin and GHB.
c Crack not included.
d Only tranquillisers. Illicit drugs includes non-prescribed use of tranquillisers but does not include ecstasy or GHB.