The percentage of U.S. adults age 18+ who had "any mental illness" in 2016, according to the Substance Abuse and Mental Health Services Administration's 2016 National Survey on Drug Use and Health (NSDUH). This comprises 44.7 million adults. Roughly 10.4 million adults had "a serious mental illness " (4.2%), and 35 million "received mental health care" (14.4%).
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.
The percentage of active duty respondents to the 2017 Blue Star Military Families Lifestyle Survey who said they planned to leave the military within the next two years for reasons other than retirement or separation. The top reason given by these respondents was "Concerns about impact of military service on family." According to the survey, "Amount of time away from family is the top concern, surpassing pay and benefits, which had been the top concern since 2013."