Prevalence of Any Mental Illness (AMI) Figure 1 shows the past year prevalence of AMI among U.S. adults. In 2020, there were an estimated 52.9 million adults aged 18 or older in the United States with AMI. This number represented 21.0% of all U.S. adults. The prevalence of AMI was higher among females (25.8%) than males (15.8%). Young adults aged 18-25 years had the highest prevalence of AMI (30.6%) compared to adults aged 26-49 years (25.3%) and aged 50 and older (14.5%). The prevalence of AMI was highest among the adults reporting two or more races (35.8%), followed by White adults (22.6%). The prevalence of AMI was lowest among Asian adults (13.9%). https://www.nimh.nih.gov/health/statistics/mental-illness You know it has drastically worsened in the last two years. Scary world.