Per the 2017 National Survey on Drug Use and Health, 11.2 million or 4.5% of non-institutionalized, non-homeless U.S. adults had a "serious mental illness" that "substantially interfered with or limited one or more major life activities." This data is based on a nationally representative face-to-face survey of 50,999 adults. To obtain free or affordable mental health care for yourself or someone else, visit the link below for Mental Health America.