Let's aim for a max of once every year, then, over the entire USA. And once that's achieved, let's aim for once every few years. Once a decade should be good enough, you probably won't get better than that.

The EU has a much bigger population than the USA, in a smaller space, and I'd bet they're already around this number.

Why is it not zero? This strikes me as the exact sort of calculus they used way back when they stopped chasing fleeing suspects in vehicles: the danger to the public is too high to justify the use of force. If you can't hit your suspect without hitting other civilians, then don't fucking fire! And no I don't particularly care if the LEO's life might be in danger either, that's literally the job they signed up for: to put themselves in danger to enforce the law. It's ridiculous that cops just get complete power of life and death every time they feel a spot of stress, and have to be handled with kid gloves by the general public less they be murdered in the streets.