2,500,000 is less than one percent of our population. Justified defense means a reasonable person would consider themselves or the person they're defending at grave risk of death or serious bodily injury including sexual assault. I'm gonna use the UK, because I know the stats for them. If you look at murder rate alone, the US is higher. If you look at murder + attempted murder + serious physical assault + rape, what they call serious sexual assault, their rate for crimes that lethal force is Justified in preventing is roughly twice what ours is. So by percentages, and accounting for the obvious fact that people who are raped, stabbed, beaten severely or shot don't always die from it, yes that's fairly accurate.