Prevalence estimates for (almost) daily cannabis use among 15 to 64 year olds are displayed in Supplemental Figure 4. In 18 countries out of 26 countries with available data, indications for increasing trends in (almost) daily cannabis use could be observed. Most pronounced increases were reported in Portugal (from 0·5% in 2012 to 3·0% in 2016) and Spain (from 2·5% in 2011 to 3·7% in 2017; see Supplemental Table 2 for estimates for all countries).
