What's the comparison to the population in general?
I know being in combat changes people forever, but when people make these claims w/o comparisons, there's usually a lack of facts.
WHO: Suicide rates
in 1999 the USA rate per 100,000 was 17.6 for men, 4.1 women.
It was about the same in 2005 according to Wiki: 17.7 for men, 4.5 for women.
Suicide in the United States - Wikipedia, the free encyclopedia
The rate among vets is three to almost four times higher:
Suicide Rate of Young Veterans Soars - CBS NewsThe VA calculated the numbers using Centers for Disease Control and Prevention numbers from 16 states. In 2005, the rate per 100,000 veterans among men ages 18-29 was 44.99, compared with 56.77 in 2007, the VA said. It did not release data for other population groups.
Wiki graph of national averages: