You can see what the CDC is concerned about with respect to accidental injuries to children:
http://www.cdc.gov/safechild/NAP/background.html
I mean that getting sooooooooo upset about a couple of children receiving superficial injuries from richocheting shotgun pellets that it's worthy of being called child endangerment is beyond silly. If taking a child to a gun range is "child endangerment," then allowing a child outside of its padded room is also child endangerment. Taking a child on a public road in a motor vehicle should make us all demand prosecution of every parent for child endangerment.
It's just silly, all the hysteria. I'm looking forward to teaching my grandson to shoot, as soon as he's old enough. He's in FAR more danger every time he gets in a car than he'll ever be plinking with a .22 at empty soda cans.
Do you have more current statistics?