I recently compiled more information on the size of the local population of veterans. The statistics that jumped out at me is that the number of World War II era veterans in the Pittsburgh MSA is down to under 23 thousand in 2012 and probably less today. It is a number I'm just guessing was close to half million in Southwestern Pennsylvania just after the war. Looking at the comparable estimate from 2010, I get 28,600. So roughly 7-8 WWII era veterans are passing away each day in the region. Reunions such as that for the Doolittle Raiders are coming to an end.
Also worth noting how different sevice experience is by age. Consider that by one estimate, nationally 85% of all men age 85-89 are veterans. I'm sure that statistic is similar locally.
Other than that I'll just pass along the Census Bureau's infographic on Veterans nationally:
[Source: U.S. Census Bureau]