The rate of wounded-but-not dead is about 9x the death rate - if 1/100 get wounded, and of those about 10% die of those wounds. There are lots of available stat

The rate of wounded-but-not dead is about 9x the death rate - if 1/100 get wounded, and of those about 10% die of those wounds. There are lots of available statistics. So the rate of major injuries falls between those, but the rate of severe PTSD is probably independent.