The Substance Abuse and Mental Health Services Administration (SAMHSA) has issued the results of a national survey that found more than 45 million Americans, or 20 percent of U.S. adults, had some form of mental illness in 2009. Of those, 11 million had a serious mental illness.
The study found the highest rate of mental illness among young adults aged 18 to 25 at 30 percent. An increase in the numbers are believed to reflect a rise in depression among the unemployed.
Notably, the survey shows that 6.1 million adults last year had a mental health illness that was not being treated.