I've often wondered if 80% of everything isn't still on the road. Depending on one's source, 70% of Harley-Davidson motorcycles are still on the road. Not only does Harley go back over 100 years, they made some real shit over the years (hello, 70s AMC Harleys). But if 70% of those are still running, I have no problem believing 80% of just about any make of vehicle are still going.