50% isn't bad at all. It sounds like a number of those injured were injured by concrete. I also agree one officer probably made the majority of the hits here.
I still doubt this 33% number for police shooting at people.
http://www.foxnews.com/us/2012/08/24...ntcmp=obinsite
In this news story they say 20%. My CCW instructor who was a Columbus PD instructor cited OPOTA statistics at just below 20%
Around me police shoot a lot of deer maimed by cars. You add in shots fired in such situations you may get up to 33%, but even that situation has some funny stories attached, such as one highway patrolman running out of ammo and doing several thousand dollars of damage without hitting a deer writhing next to a car.
Like most of the military, police simply do not train with their firearms as part of their department funded training. They have lots of other stuff to worry about. Like sexual harassment.