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World map of annual cannabis prevalence. This is a list of the annual prevalence of cannabis use by country (including some territories) as a percentage of the population. The indicator is an "annual prevalence" rate which is the percentage of the youth and adult population who have consumed cannabis at least once in the past survey year.
Adult lifetime cannabis use by country is the lifetime prevalence of cannabis use among all adults in surveys among the general population. [ 1 ] [ 2 ] Lifetime prevalence means any use of cannabis during a person's life.
The time to onset of effects depends strongly on stomach content, but is usually 1 to 2 hours, and may continue for a considerable length of time, whereas the effects of smoking or vaporizing cannabis are almost immediate, lasting a shorter length of time. [10] All of the active constituents enter the body when cannabis is consumed orally.
The United Nations' World Drug Report stated that cannabis "was the world's most widely produced, trafficked, and consumed drug in the world in 2010", and estimated between 128 million and 238 million users globally in 2015. [224] [225]
The addition of ancillary products and services amounts to an economic impact that is estimated at four times the value of direct sales of cannabis. Based on this multiplier, the total economic impact of the cannabis industry in the United States was $16-$18 billion in 2016 and is expected to reach $47.6-$68.4 billion by 2021.
[36] A World Health Organization survey found that the U.S. is the world's leading per capita marijuana consumer. [37] The 2007 National Survey on Drug Use & Health prepared by the U.S. Department of Health and Human Services indicated that 14.4 million U.S. citizens over the age of 12 had used marijuana within a month. [38]
Cannabis regulatory agencies exist in several of the U.S. states and territories, the one federal district, and several areas under tribal sovereignty in the United States which have legalized cannabis. In November 2020, 19 state agencies formed the Cannabis Regulators Association.
Possession of up to 20 g (3 ⁄ 4 oz) of marijuana or 5 g (3 ⁄ 16 oz) of genetically modified marijuana for commercial purposes is punishable by 1–2 years in prison at judge's discretion. If deemed to be for personal consumption, the user is subject to security measures involving rehabilitation and detoxification procedures.