The rate of U.S. adolescents ages 12 to 17 who reported experiencing symptoms of major depressive disorder increased by 52% between 2005 and 2017. Among young adults ages 18 to 25, the rate of those reporting symptoms of major depression increased by 63% from 2009 to 2017. These findings were reported in "Age, period, and cohort trends in mood disorder indicators and suicide-related outcomes in a nationally representative dataset, 2005–2017" by Jean M. Twenge, A. Bell Cooper, Thomas E. Joiner, Mary E. Duffy, and Sarah G. Binau. The researchers analyzed data from the National Survey on Drug . . .