Final answer:
Approximately 50% of people with psychological disorders receive clinical treatment in a typical year in the United States.
Step-by-step explanation:
The question asks about the percentage of people with psychological disorders who receive clinical treatment in a typical year in the United States. Mental illnesses are a significant concern for the health system, and they encompass a range of conditions, including anxiety disorders, depression, and obsessive-compulsive disorder (OCD), among others. According to the National Institute of Mental Health, approximately 50% of people with psychological disorders receive clinical treatment within a typical year in the U.S. This indicates a significant treatment gap, as half of those with mental health conditions do not receive the care they might benefit from.