Fig 10. Estimated fraction of national community dwelling population aged 20 years and older that consumes cannabis daily or almost daily, by month, and estimated fraction of population age 20 years and older enrolled in medical cannabis access program, by month 2005m1 – 2021m12.

Note: the blue line is a median spline curve fitted to the national estimates of fraction of population 20+ that uses cannabis daily (the blue dots). The red line is a median spline curve fitted to the national participation rates in the medical access program (the red dots). The green vertical lines indicate the introduction of the following policies: 1) the 2014 Marihuana for Medical Purposes Regulations (MMPR) regime which delegated medical cannabis authorization to physicians and expanded the indications for cannabis use; and 2) the October 2018 legalization of recreational cannabis.