I'd say that any number over 0 is not Ok. That would be like saying only a very small percentage of the population gets killed by cops. Again, anything over 0 == Not Ok. And just because you can cherry pick a dangerous job that happens to be more dangerous than being a cop doesn't make being a cop any less dangerous.
>>tharne+(OP)
If you want to save lives, then armed cops are killing far more people than cops are being killed every year. So, removing guns from a cops normal uniform would very much save lives.