Number one, what is "5% disabled" as it refers to military service?
When you retire from the military you have a medical exam. Part of that is to assess your physical state and to set your 'disbility' rating for further compensation of retirement pay (also for VA benifits, if any). That is the simple explination, since it is government it is much more complicated.
Example;
I will retire in 18 months with 28 years service. That's 50% of my base pay + 2% for each year over 20 for 66% of base pay. My medical condition is kind of poor. I've lost hearing in one ear completely, and the other is a significant loss. I am partly blind in one eye. Both of these are service related. Furthermore, I was diagnosed with Pulminary Sarcoidosis and am in Stage IV of that desease.
With those things I am no longer deployable, and have had a medical board to see if I can still serve. They've chosen to let me stay in, but on limited duty.
When I retire I will go through a medical screening by the Army and the VA. They will give certain % for each thing that is FUBAR in my body, i.e. loss of eyesight in one eye = 12%. Then they add it up and that is your total disability rating.
In Colorado if you are over 50% disabled you get all sorts of bennies. Free Park permits being one of them.
5% diabilty means his penis is short and doesn't work well, anyway...
(it's not very high, that is.)