Talleying that table gives 14 Senators with military service, 9 Democrats and 5 Republicans, 71 Representatives, 29 Democrats, 41 Republicans and one Independent (Goode, VA). Grand total of Congressmen with military service is 38 Democrats and 46 Republicans, with one Independent.
Most of the Democrats are older. People born after 1951 served in the Military in far fewer numbers than people born before. Don't tell me Teddy Kennedy spent two years in the Army because of martial ardor or that Charles ("Let's reinstate the draft") Rangel is a votary of Mars.
Among the Democrats it's overwhelmingly the old farts like Kennedy and Kerry who have military time. I'll bet there isn't one Democratic member of congress with military experience under age 50.