Rather than having one big killing, we spread our injuries across the nation.
Locally, we have an instance of a 16 year old boy trying to build his own fireworks and blowing off two of his fingers.
Availability is the key. We are just as stupid as they are, but we don't live in an area which has seen the wars that they have. We have some difficulty in acquiring mortars.
We have to go out of our way to get explosives to injure ourselves.
And we do.
Something to think about. If it were possible for individuals here to acquire mortars, would we be seeing injuries from them. :)