vets_code	vets_text
00	N/A
01	Veteran
03	Vietnam era and earlier wartime periods
09	Gulf War Era
12	Veterans who served in Gulf War Era 2 (whether or not they served in Era 1)
13	Veterans who served in Gulf War Era 1 but not Gulf War Era 2
16	Other Service Periods (may include peacetime)
25	Nonveteran