During the period studied, the proportion of drug-related offenses related to ¡®stimulants?has decreased, despite those drugs accounting for the highest proportion of such offenses, and the proportion?of offenses related to ¡®cannabis?has increased markedly. Therefore, organizations implementing measures to prevent drug-related offenses should be aware of the recent increase in the number of people arrested for ¡®cannabis?and the high proportion of arrests for ¡®stimulants?