American (mostly adult) prevalence estimates
by disorder

Mental disorders are common with about 1 in 4 American adults having a diagnosable mental disorder in a given year. Four of the ten leading causes of disability are mental disorders: major depression, bipolar disorder, schizophrenia, and obsessive-compulsive disorder. Many people suffer from more than one mental disorder at a given time.

Each year Americans suffer from mental illness
60 million Depressions
40 million Sleep Disorders
19 million Anxiety disorders
11 million Dysthymic disorders
06 million Specific phobias
05 million Social phobias
05 million Post-Traumatic Stress Disorders
05 million Eating disorders
03 million Agoraphobias
03 million Obsessive Compulsive Disorders
03 million Attention Deficit-Hyperactivity Disorders
02 million Bipolar disorders
02 million Panic disorders
02 million Schizophrenias