what percent of people have a mental illness
Learning about some of the most common mental and substance use disorders can help people recognize their signs and to seek help. According to SAMHSAâs 2014 National Survey on Drug Use and Health (NSDUH) (PDF | 3.4 MB) an estimated 43.6 million (18.1%) Americans ages 18 and up experienced some form of mental illness. In the past year, 20.2 million adults (8.4%) had a substance use disorder.