Rates of depression and anxiety among young people in America have been increasing steadily for the past fifty to seventy years. Today five to eight times as many high school and college students meet the criteria for diagnosis of major depression and/or an anxiety disorder as was true half a century or more ago. This increased psychopathology is not the result of changed diagnostic criteria; it holds even when the measures and criteria are constant.

via The Dramatic Rise of Anxiety and Depression in Children and Adolescents: Is It Connected to the Decline in Play and Rise in Schooling? | Psychology Today.