Current Marijuana and Other Illegal Substance Use and Trends in the US

"The estimated 30.5 million people aged 12 or older who were current illicit drug users in 2017 represent 11.2 percent of the population aged 12 or older (Figures 11 and 12). Stated another way, 1 in 9 individuals aged 12 or older in the United States used illicit drugs in the past month. Approximately 2.0 million adolescents aged 12 to 17 in 2017 were current users of illicit drugs, which represents 7.9 percent of adolescents. Approximately 1 in 4 young adults aged 18 to 25 (24.2 percent) were current users of illicit drugs in 2017. This percentage corresponds to about 8.3 million young adults who were current users of illicit drugs. An estimated 9.5 percent of adults aged 26 or older were current users of illicit drugs, or about 20.2 million adults in this age group.

"Marijuana Use
"As noted in the illicit drug use section, an estimated 26.0 million Americans aged 12 or older in 2017 were current users of marijuana (Figure 11). This number of past month marijuana users corresponds to 9.6 percent of the population aged 12 or older (Figure 13). The percentage of people aged 12 or older who were current marijuana users in 2017 was higher than the percentages from 2002 to 2016. This increase in marijuana use among people aged 12 or older reflects increases in marijuana use among both young adults aged 18 to 25 and adults aged 26 or older."

Source: 

Substance Abuse and Mental Health Services Administration. (2018). Key substance use and mental health indicators in the United States: Results from the 2017 National Survey on Drug Use and Health (HHS Publication No. SMA 18-5068, NSDUH Series H-53). Rockville, MD: Center for Behavioral Health Statistics and Quality, Substance Abuse and Mental Health Services Administration. Retrieved from https://www.samhsa.gov/data/
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