Changes in Lifetime Prevalence of Substance Use in Portugal, 2007 to 2012

"Between 2007 and 2012 in the set of the Portuguese population there was a general decrease in lifetime prevalence6 (any illicit drug from 12% to 9.5%) and recent use (any illicit drug from 3.7% to 2.7%), with the exception of ecstasy and LSD, whose lifetime prevalence remained the same and LSD use in last 12 months increased slightly.

Estimated Number of Current Drug Users in Sweden

"Two per cent of the men and 0.9 per cent of the women reported some type of illicit drug use in the past 30 days, corresponding to approximately 53,000 men and 24,000 women or a total of 77,000 people. Adding to this the 50,000 people who in the past 30 days had used prescription medicine without a doctor’s prescription, the total figure increases to 127,000 people. The population study indicates that the highest proportion of regular drug use is found among young men between the ages of 15 to 24, while the highest proportion among women is observed in the ages of 25 to 34.

Estimated Prevalence of Past-Year Illicit Substance Use in Sweden

"In 2013, an additional cross-sectional study of drug use was conducted in a nationally representative sample of the population in Sweden (Ramstedt, 2014). A total of 15,576 individuals (59.3% of the total sample) participated in the study and 10.5% reported that they had used an illicit drug or used some prescription medication in a non-prescribed way during the past 12 months. In this study, cocaine and amphetamines were the most common illicit substance reported after cannabis.

Growth of Jails in the US 2000-2016

US jails held, as confined inmates, 621,149 people in 2000; 767,434 people in 2009; 748,728 people in 2010; 735,601 people in 2011; 744,524 people in 2012; 731,208 people in 2013; 744,592 people in 2014; 727,400 people in 2015; and 740,700 people in 2016.
The above are mid-year counts of inmates confined by local jails on the last weekday of June for each year. Counts were estimated from the Annual Survey of Jails.

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

"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).

Prevalence and Perceived Risk From Marijuana Use Among Young People in the US

"Annual marijuana prevalence peaked among 12th graders in 1979 at 51%, following a rise that began during the 1960s. Then use declined fairly steadily for 13 years, bottoming at 22% in 1992—a decline of more than half. The 1990s, however, saw a resurgence of use. After a considerable increase (one that actually began among 8th graders a year earlier than among 10th and 12th graders), annual prevalence rates peaked in 1996 at 8th grade and in 1997 at 10th and 12th grades. After these peak years, use declined among all three grades through 2007 or 2008.

Prevalence of Substance Use Among Youth in the US, by Race/Ethnicity

"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.

Prevalence of Past-Month (Current) Marijuana Use in the US

"As noted in the illicit drug use section, an estimated 24.0 million Americans aged 12 or older in 2016 were current users of marijuana (Figure 15). This number of past month marijuana users corresponds to 8.9 percent of the population aged 12 or older (Figure 17). The percentage of people aged 12 or older who were current marijuana users in 2016 was higher than the percentages from 2002 to 2015.

Estimated Number of Persons in the US Classified with Substance Dependence or Abuse

"NSDUH’s overall estimates of SUD include people who met the DSM-IV criteria for either dependence or abuse for alcohol or illicit drugs. In 2017, approximately 19.7 million people aged 12 or older had an SUD in the past year, including 14.5 million people who had an alcohol use disorder and 7.5 million people who had an illicit drug use disorder (Figure 39).