177 suicides to 176 actual combat fatalities.
War is Hell.
I did the research several months back with a thread similar to yours. But, go look at the increased rate of suicide among Americans as a whole, and you will see that the increase in the rate of suicide among every day Americans is nearly identical to the increase in the rate of suicide among our military.
It is indeed sad, but it has nothing to do with war. America has an ever growing population that is willing to take it's life, both military and civilian. And, the numbers are growing at the same rate for both.