"In 2016, 71.8 percent of youths aged 12 to 17 who were enrolled in school in the past year reported having seen or heard drug or alcohol use prevention messages at school (Figure 10). This percentage was lower than the percentages in 2002 to 2013, but it was similar to the percentages in 2014 and 2015. In 2002, for example, 78.8 percent of adolescents who were enrolled in school reported exposure to substance use prevention messages at school.

"In 2016, about 1 in 9 youths aged 12 to 17 (11.4 percent) reported that they had participated in alcohol, tobacco, or drug use prevention programs outside of school in the past year (Table A.4B in Appendix A). This estimate was similar to the percentages in 2004 to 2015, but it was lower than the percentages in 2002 and 2003. Nevertheless, in any given year since 2002, the majority of youths did not participate in prevention programs outside of school in the past year."

"Compared to teens in families with strong Family Ties, teens in families with weak Family Ties are:
"• Four times likelier to have tried tobacco;
"• Four times likelier to have tried marijuana; and
"• Almost three times likelier to have tried alcohol."

"• Most youths aged 12 to 17 believed their parents would "strongly disapprove" of their using substances. In 2012, 89.3 percent of youths reported that their parents would strongly disapprove of their trying marijuana or hashish once or twice, which also was the rate in 2011 and was similar to the 89.1 percent reported in 2002. Most youths in 2012 (90.5 percent) reported that their parents would strongly disapprove of their having one or two drinks of an alcoholic beverage nearly every day, which also was the rate in 2011, but was higher than the rate in 2002 (89.0 percent).

"• In 2012, past month use of illicit drugs and cigarettes and binge alcohol use were lower among youths aged 12 to 17 who reported that their parents always or sometimes engaged in supportive or monitoring behaviors than among youths whose parents seldom or never engaged in such behaviors. For instance, the rate of past month use of any illicit drug in 2012 was 7.6 percent for youths whose parents always or sometimes helped with homework compared with 18.1 percent among youths who indicated that their parents seldom or never helped.

"• Youths aged 12 to 17 were asked several questions related to the extent of support, oversight, and control that they perceived their parents provided or exercised over them in the year prior to the survey interview. In 2012, among youths aged 12 to 17 who were enrolled in school in the past year, 70.3 percent reported that their parents limited the amount of time that they spent out with friends on school nights. This rate in 2012 was similar to the rate reported in 2011 (69.9 percent) and also in 2002 (70.7 percent).