Still not enough, the accidental discharge rate started going up as the popularity of the shooting sports started going down in the 50's and with the advent of the GCA of 68. Up until then firearms were sold EVERYWHERE from gun shops to gas stations, the decline in hunting also has had alot to do with it. When I took my first hunter safety course it was taught in HS and we used to bring shotguns to school during small game season [rabbit, pheasant, quail, etc] and school was closed during the opening days of deer season.
My kids grew up with guns, in racks and my son got his own first at around 10, a 20 gage pump youth model. My daughter was 10 also when she got her first, a ruger 10/22 with a pink synthetic stock and 2-12 power scope.
Heck, my dads employer, Ballentine beer company sponsored 4 shooting teams, small bore pistol, rifle, big bore and skeet n trap, they shot at the company brewery in Newark and various ranges in NJ. They even gave him a .22 heavybarrel winchester match rifle in a wood case. Ballentines actually had an arms room as did the other brewerys throughout the tristate area.
I remember when my dad was a member of the National Guard after WWII we'd go up to the armoury in west orange where he drilled and check out weapons from the arms room, it wasn't even locked during the day, you signed out the weapons and ammo on the honor system. I learned how to fire the .30 cal browning when I was 10 from a tripod, jeep pintle and the sherman pintle mounts, I hated firing the one in the coax mount cause the brass was a major PIA to clean up inside the tank.
Personally I think firearms safety should be taught in school as part of physical education and small bore shooting should be brought back into school as a normal thing. This war on terror is going to be going on for many many years, as long as there are extremeists in large numbers. I firmly believe that our children not only need to be well versed in the arts and science but in war as well.