The "number of elderly veterans" projected for the year 2039, which is double the current population of 2 million, according to an article on the website Military.com -- Anticipating Boom of Aging Veterans, VA to Expand Care, Services for the Elderly.
The number of "children under the age 18 living with a disabled veteran," according to a White House press release:
The percentage of veterans with PTSD who have a comorbid substance use disorder (SUD), according to a recent article in the journal Drug and Alcohol Dependence Reports -- Rates and predictors of psychotherapy receipt among U.S. veterans with comorbid posttraumatic stress disorder and substance use disorders. The article indicates that "up to 75% of veterans with a SUD also have PTSD"
The percentage of the total DOD military force that is under 25 years of age, according to a recent report from the Congressional Research Service -- Military Families and Financial Readiness.
The number of telehealth "occurrences" in the U.S. military health system in 2018, according to an article recently published online in the journal Telemedicine and e-Health - Analysis of Telehealth Usage and Trends in the Military Health System, 2006–2018.