9/12/2011 I particularly wanted to find out about my daughters’ age groups. The survey says:

Young Adults Aged 18 to 25

• In 2010, the rate of current illicit drug use was higher among young adults aged 18 to 25 (21.5 percent) than among youths aged 12 to 17 (10.1 percent) and adults aged 26 or older (6.6 percent). Among young adults, the rates were 18.5 percent for marijuana, 5.9 percent for nonmedical use of psychotherapeutic drugs, 2.0 percent for hallucinogens, and 1.5 percent for cocaine.
• In 2010, 10.1 percent of youths aged 12 to 17 were current illicit drug users, with 7.4 percent current users of marijuana, 3.0 percent current nonmedical users of psychotherapeutic drugs, 1.1 percent current users of inhalants, 0.9 percent current users of hallucinogens, and 0.2 percent current users of cocaine.
• Among youths aged 12 to 17, the types of illicit drugs used in the past month varied by age group in 2010. Among 12 or 13 year olds, 2.0 percent used psychotherapeutic drugs nonmedically, 1.4 percent used inhalants, and 0.9 percent used marijuana. Among 14 or 15 year olds, 6.5 percent used marijuana, 3.0 percent used psychotherapeutic drugs nonmedically, 1.2 percent used inhalants, and 1.1 percent used hallucinogens. Among 16 or 17 year olds, 14.3 percent used marijuana, 3.9 percent used psychotherapeutic drugs nonmedically, 1.3 percent used hallucinogens, 0.6 percent used inhalants, and 0.5 percent used cocaine.
• After gradually declining from 11.6 percent in 2002 to 9.3 percent in 2008, the rate of current illicit drug use among 12 to 17 year olds increased to 10.0 percent in 2009 and 10.1 percent in 2010. Current marijuana use declined from 8.2 percent in 2002 to 6.7 percent from 2006 through 2008 before increasing to 7.3 percent in 2009 and 7.4 percent in 2010. Current nonmedical use of psychotherapeutic drugs declined from 4.0 percent in 2002 and 2003 to 3.0 percent in 2010. Current use of Ecstasy declined from 0.5 percent in 2002 to 0.3 percent in 2004 through 2007 before increasing back to 0.5 percent in 2009 and 2010.

Youths Aged 12 to 17

• The rate of current illicit drug use among youths aged 12 to 17 remained similar from 2009 to 2010 (10.0 vs. 10.1 percent), but higher than the rate in 2008 (9.3 percent). Between 2002 and 2008, the rate declined from 11.6 to 9.3 percent.
• In 2010, 10.1 percent of youths aged 12 to 17 were current illicit drug users, with 7.4 percent current users of marijuana, 3.0 percent current nonmedical users of psychotherapeutic drugs, 1.1 percent current users of inhalants, 0.9 percent current users of hallucinogens, and 0.2 percent current users of cocaine.
• Among youths aged 12 to 17, the types of illicit drugs used in the past month varied by age group in 2010. Among 12 or 13 year olds, 2.0 percent used psychotherapeutic drugs nonmedically, 1.4 percent used inhalants, and 0.9 percent used marijuana. Among 14 or 15 year olds, 6.5 percent used marijuana, 3.0 percent used psychotherapeutic drugs nonmedically, 1.2 percent used inhalants, and 1.1 percent used hallucinogens. Among 16 or 17 year olds, 14.3 percent used marijuana, 3.9 percent used psychotherapeutic drugs nonmedically, 1.3 percent used hallucinogens, 0.6 percent used inhalants, and 0.5 percent used cocaine.
• After gradually declining from 11.6 percent in 2002 to 9.3 percent in 2008, the rate of current illicit drug use among 12 to 17 year olds increased to 10.0 percent in 2009 and 10.1 percent in 2010. Current marijuana use declined from 8.2 percent in 2002 to 6.7 percent from 2006 through 2008 before increasing to 7.3 percent in 2009 and 7.4 percent in 2010. Current nonmedical use of psychotherapeutic drugs declined from 4.0 percent in 2002 and 2003 to 3.0 percent in 2010. Current use of Ecstasy declined from 0.5 percent in 2002 to 0.3 percent in 2004 through 2007 before increasing back to 0.5 percent in 2009 and 2010.

Read this piece–it’s very interesting and informative: http://oas.samhsa.gov/NSDUH/2k10NSDUH/2k10Results.htm#2.3