Almost 30 percent of those ages 18 to 25 experienced a mental illness, twice as many as those ages 50 and older, at just over 14 percent.
More women than men suffered a mental illness last year.
The economic downturn may be a factor for some, but there are also other factors including genetics, biological issues, as well as social and personal issues.
The report defines mental illness as having a mental, behavioral or emotional problem based on the psychiatric manual.
