Come on monster, you're better than that: you saw the table with the US suicide rates at approx. 60% of all gun deaths, you could've at least checked the other stats in the same table: of the other 9 countries in the table, only Italy (55% suicide) and UK (57% suicide) have lower proportions of suicide, but Switzerland, Finland and France are all over 90% suicide, Canada and Australia are over 80%. If you look at purely homicides, the US has nearly 5 times as many gun-related deaths as any of the other countries.
As for accounting for 'justifiable' deaths, let's assume a man with a weapon comes into your home/workplace/pub, intend on massacre. Let's assume we want to minimise the number of people that die before the intruder is disarmed/leaves/dies. How large do you think that number is likely to be if he has a gun versus him having a knife/baseball bat? Very obvious question, with a very obvious answer.
You're labouring under the assumption it's impossible to get guns off criminals: it's not, Europe has managed it (though the fact we never allowed every idiot with psychiatric problems to have an assault rifle probably helps us reduce numbers anyway...).
I'm sure you having a gun is no danger to anyone, but you have to look at the bigger picture: there's no way of telling who's going to go nuts, and it is safer for the majority to take lethal weapons off everyone. But of course, your personal rights take precedence over the majority