Actually I think a 50% drop in accidents is pretty good, especially given how many new dangerous things we've invented since then.

Actually there was an article the other day about accidental death rates: death due to drug overdose has overtaken death due to car accident, due to a dramatic drop in one and rise in the other.

http://abcnews.go.com/Health/Drugs/drug-deaths-exceed-traffi...

The extent to which drug overdoses can be called "accidental" is, of course, debatable, but I guess they're classified as accidental at least in cases where it's not obviously suicide.