Final answer:
The numbers of people reported to have suffered from a mental disorder in the USA varies depending on the age group. According to the National Institute of Mental Health, there are over 50 million adults with mental illness or mental disorder in the USA, which makes up 20 percent of the total adult population.
Step-by-step explanation:
The numbers of people reported to have suffered from a mental disorder in the USA vary depending on the age group. According to the National Institute of Mental Health (NIMH), there are over 50 million adults with mental illness or mental disorder in the USA, which makes up 20 percent of the total adult population. Of these adults, 13 million have a serious mental illness or disorder, which amounts to 5 percent of the adult population. In addition, approximately 16.5 percent of children aged 6-17 experience mental illness or disorder.