The percentage of people age 12+ in the United States who reported using antidepressant medication in the past month during 2011-2014, according to a data brief released earlier this year by the Center for Disease Control and Prevention's National Center for Health Statistics.
Some other data points from the report:
During 2011–2014, non-Hispanic white persons were more likely to take antidepressant medication in the past month compared with other race and Hispanic groups.
One-fourth of persons who took antidepressant medication in the past month had been doing so for 10 years or more.
Overall and in each age group, females were about twice as likely as males to take antidepressant medication. Overall, antidepressant use increased with age.
Antidepressant use in the past month increased overall, from 7.7% in 1999–2002 to 12.7% in 2011–2014.