How many people in the U.S, and worldwide are affected by a mental disorder?

How many people in the U.S, and worldwide are affected by a mental disorder?

　

According to statistics compiled by the World Health Organization, about 500 million people worldwide (7%) are affected by a mental disorder.

According to a rigorous health survey conducted by the CDC (U.S. Department of Health & Human Services) in 2004, an estimated 25 percent of adults in the U.S. reported having a mental illness in the previous year.