Let me get away from quoting and replying to posts and say this. I don't like gun, knives or other weapons. I don't like people killing other people. Death to me is a huge negative. Self defense or not I don't like the idea of one person taking another persons life. Also, I don't like limiting of freedom in america. I think it is sad that we live in a society where we think we have to have gun to protect ourselves or think that we need to pat down people at an airport so they don't wreck havok on people. For me the gun issue is a double edged sword. Kind of like the no smoking laws. Am I happy that there would be less smoke in the air and less guns on the street? Yes, but I don't like the idea of government mandating it be that way.
As for what silver was saying about his wife training in weapons. It is not as simple as that. I've seen a bunch of trained people crack under pressure. Training will not save you in every situation. It does help a bunch though.
And for safety belts you stat was way off. As of 2004 the life saving of wearing a seat belt was around 50 $ not 9 out of 10 (90 percent)
http://www.jmu.edu/safetyplan/vehicle/generaldriver/safetybelt.shtml
Approximately 35,000 people die in motor vehicle crashes each year. About 50 percent (17,000) of these people could be saved if they wore their safety belt