" In 2018 for the first time in the history of the survey the majority of 12th grade students did not favor legally prohibiting marijuana use in public places. The proportion of 12th graders who favor legally prohibiting marijuana use in public places decreased by 2 percentage points to 48% in 2018, continuing a long decline since 2008, when 70% favored prohibition. The percentage favoring legal prohibitions against use in private was also at a historic low of 22% in 2018, down from 82% in 1990.
Estimated prevalence and trends in use of various substances by young people and adults in the United States and worldwide.
Trends in Prevalence of Current Heroin Use in the US:
Estimated Prevalence of Current Cocaine Use in the US: "In this report, estimates of the use of cocaine include use of crack cocaine. Estimates also are presented separately for crack use. In 2015, the estimate of about 1.9 million people aged 12 or older who were current users of cocaine (Figure 1) included about 394,000 current users of crack. These numbers correspond to about 0.7 percent of the population aged 12 or older who were current users of cocaine (Figure 7) and 0.1 percent who were current users of crack (Table A.1B in Appendix A). The 2015 estimate for current cocaine use was similar to the estimates in most years between 2007 and 2013, but it was higher than the estimate in 2014. The 2015 estimate of crack use was similar to the estimates in most years from 2008 to 2014. The 2015 estimates of both cocaine and crack use were lower than most of the estimates between 2002 and 2006."
Estimated Misuse of Prescription Drugs and Pain Relievers in the US: About 1.0 percent of people aged 12 or older (2.7 million) had a prescription drug use disorder in the past year, including 2.0 million people with a pain reliever use disorder, 688,000 with a tranquilizer use disorder, 426,000 with a stimulant use disorder, and 154,000 with a sedative use disorder. In 2015, as part of their most recent substance use treatment, 822,000 people received treatment for the misuse of pain relievers, 293,000 people received treatment for tranquilizer misuse, 139,000 received treatment for stimulant misuse, and 116,000 received treatment for sedative misuse.
"In 2018, an estimated 164.8 million people aged 12 or older used a substance (i.e., tobacco, alcohol, or an illicit drug) in the past month (Figure 1). This number of current substance users corresponds to 60.2 percent of the population. About 2 out of 5 people aged 12 or older (108.9 million, or 39.8 percent) did not use substances in the past month. The 164.8 million current substance users in 2018 include 139.8 million people who drank alcohol, 58.8 million people who used a tobacco product, and 31.9 million people who used an illicit drug (2018 DT 7.3).
Estimated Prevalence of Marijuana Use in the US: "As noted in the illicit drug use section, an estimated 22.2 million Americans aged 12 or older in 2015 were current users of marijuana (Figure 1). This number of past month marijuana users corresponds to 8.3 percent of the population aged 12 or older (Figure 3). The percentage of people aged 12 or older who were current marijuana users in 2015 was similar to the percentage in 2014, but it was higher than the percentages from 2002 to 2013. This increase in marijuana use among people aged 12 or older reflects the increase in marijuana use by adults aged 26 or older and, to a lesser extent, increases in marijuana use among young adults aged 18 to 25."
"In 2018, nearly 1 in 5 people aged 12 or older (19.4 percent) used an illicit drug in the past year, which is a higher percentage than in 2015 and 2016. The estimate of past year illicit drug use for 2018 was driven primarily by marijuana use, with 43.5 million past year marijuana users. The percentage of people aged 12 or older in 2018 who used marijuana in the past year (15.9 percent) was higher than the percentages in 2002 to 2017.
"In 2018, an estimated 164.8 million people aged 12 or older used a substance (i.e., tobacco, alcohol, or an illicit drug) in the past month (Figure 1). This number of current substance users corresponds to 60.2 percent of the population. About 2 out of 5 people aged 12 or older (108.9 million, or 39.8 percent) did not use substances in the past month.
"For a number of years, 12th grade African-American students reported lifetime, annual, 30-day, and daily prevalence levels for nearly all drugs that were lower – sometimes dramatically so – than those for White or Hispanic 12th graders. That is less true today, with levels of drug use among African Americans more similar to the other groups. This narrowing of the gap between African Americans and other racial/ethnic groups is also seen in 8th and 10th grade, indicating that this narrowing in 12th grade is almost certainly not due primarily to differential dropout rates.
"In 2015, approximately 20.8 million people aged 12 or older had an SUD in the past year, including 15.7 million people who had an alcohol use disorder and 7.7 million people who had an illicit drug use disorder (Figure 27). An estimated 2.7 million people aged 12 or older had both an alcohol use disorder and an illicit drug use disorder in the past year (Figure 28). Thus, among people aged 12 or older in 2015 who had an SUD in the past year, nearly 3 out of 4 had an alcohol use disorder, and about 1 out of 3 had an illicit drug use disorder.