In the United States, almost half of adults (46.4 percent) will experience a mental illness during their lifetime.
5 percent of adults (18 or older) experience a mental illness in any one year, equivalent to 43.8 million people.
Of adults in the United States with any mental disorder in a one-year period, 14.4 percent have one disorder, 5.8 percent have two disorders and 6 percent have three or more.
Half of all mental disorders begin by age 14 and three-quarters by age 24.
In the United States, only 41 percent of the people who had a mental disorder in the past year received professional health care or other services.
Source of information: www.mentalhealthfirstaid.org