According to the 2011 National Survey on Drug Use and Health , one in five adults in the United States suffered from a mental illness in 2011. This federal government report defined mental illness as a person having a diagnosable mental, behavioral, or emotional disorder, and included more than 65,000 Americans aged 12 and above. The rate of mental illness was found to be twice as likely in the 18-to-25-year-old age group, close to 30 percent, than it is in those age 50 and above (about 14 percent). Furthermore, women were more likely to have suffered a mental illness than men (about 23 percent versus 16 percent). Of the 45.6 million people with a mental illness, about 11.5 million reported a serious mental illness, about 5 percent of the adult population. About 38 percent of adults with a mental illness in 2011 received treatment during the year – and about 60 percent of those with a serious mental illness sought help during that time. Youth also were studied, and it was found that 2 million adolescents between age 12 and 17 had a major depressive episode in 2011, about 8 percent of the population. Young people who had a major depressive epsidoe were more than twice as likely to use illicit drugs than those who did not (36 percent versus 17 percent). Rates of mental illness remained stable from the prior year.