Nearly 1 in 10 adults suffer from the debilitating effects of mood disorders. In 2020 it was estimated that 21.0 million adults in the United States had at least one major depressive episode. This number represented 8.4% of all U.S. adults. The prevalence of adults with a major depressive episode was highest among individuals aged 18-25 (17.0%). The prevalence of major depressive episodes was highest among those who report having multiple (two or more) races (15.9%).
-from the National Institute of Mental Health

Periods of transition and life stressors often precipitate or intensify symptoms of anxiety and depression. According to the World Health Organization (WHO), 1 in 13 globally suffers from anxiety. The WHO reports that anxiety disorders are the most common mental disorders worldwide and in the U.S. 40 million adults in the United States age 18 and older, or 18.1% of the population every year are affected by anxiety, and despite being highly treatable only 36.9% of those suffering receive treatment.
-from ADAA of America