For the whole period from 1930 to 1946 the Royal Canadian Mounted Police recorded only 25 cannabis arrests, and between 1946 and 1961 cannabis accounted for 2 per cent of all drug arrests in Canada. Cases rose to 2,300 in 1968 and 12,000 in 1972.[1][2]
Listed for context. No score change is recorded for Canada here.
References
Checked. The date and the event were compared with a source that was read.