According to a frequently voiced opinion drug seizures represent 5 to 10 percent of drug traded in the market. In this article we estimate the size of the Finnish cannabis trade by calculating the number of users and the amount of the substance consumed in a year. We divide the subjects into five different groups based on the annual frequency of use: experimenters (1-4 days), modest occasional users (5-12 days), frequent occasional users (13-51 days), weekly users (52-181 days) and, finally, daily users (182-365 days).
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