> Around 1 in 12 (8.6%) adults aged 16 to 59 had taken an illicit drug in the last year. This equated to around 2.8 million people. This level of drug use was similar to the 2013/14 survey (8.8%), but significantly lower than a decade ago (11.2% in the 2004/05 survey).
Cannabis, page 3 (The chart on that page is pretty clear.)
> As in previous years, cannabis was the most commonly used drug in the last year, with 6.7 per cent of adults aged 16 to 59 using it in the last year, similar to the 2013/14 survey (6.6%; Figure 1.2). Over the longer-term, between the 1998 and 2003/04 surveys, the last year use of cannabis was stable, at around 10 per cent of adults, before falling to 6.5 per cent in 2009/10. The trend since the 2009/10 survey has been relatively flat, at between six and seven per cent (Table 1.02).
> Among younger adults aged 16 to 24, cannabis was also the most commonly used drug, with 16.3 per cent having used it in the last year. This was not statistically significantly different from the level in 2013/14 (15.1%), but was a significant fall compared with the 1996 survey (25.8%).
> Although the trend in the use of cannabis among 16 to 24 year olds appears to have shown a steady increase compared with the 2012/13 survey, it is too early to conclude that this is an emerging pattern at this stage. The estimates from the 2012/13 survey appear to be out of line with recent results, and a comparison of the latest estimate to previous years may indicate that the trend, which has been falling since the peak in 1998, has gradually stabilised (Table 1.06).
> The biennial High School Youth Risk Behavior Surveillance System survey from the Centers for Disease Control and Prevention revealed that the rate of marijuana use among U.S. high school students remained virtually unchanged from 2011 to 2013. It's also about 3 percent less than the peak of teen marijuana use in 1999, when nearly 27 percent of teens said they had recently used marijuana, according to the CDC data.
> In 2013, 23.4 percent of American high-school-aged teens used marijuana one or more times in the 30 days before the survey, the data show. That's nearly even with 23.1 percent in 2011.
