One of the many benefits that martial arts schools (including my own) claim to have is 'self-defense'. In fact just about every martial art claims that this is a benefit.
In the spirit of this question:
How much of a risk is assault occasioning actual bodily harm (or assault and battery if you are American)? Obviously, if you work as a bouncer or in the police or army or as a paramedic, this will increase. I'm not interested in gun violence for this question; I have yet to see a plausible gun disarm technique (yes, I have heard of krav maga and systema).
But for an average person going about their everyday life what is the probability of being assaulted? This can be Domestic Violence, bar fights, anything.
I asked before about comparing martial arts injuries to injuries from Assault both in terms of statistics:
No-one here really seems willing to think about this, let alone answer numerically. However, I feel the question is important enough to warrant an answer.
So let's break it down and take the sports injuries element out entirely.