The US army has said the number of suicides in the military last year was the highest since records began, with 115 recorded. http://news.bbc.co.uk/1/hi/world/americas/7426875.stm
http://news.yahoo.com/s/ap/20080530/ap_on_go_ca_st_pe/military_suicides More complete info in the yahoo link. Breaks down the stats and comparisions to general population.