i've only had one serious accident in my 8 years of bike commuting. <knock on wood>

i was hit by a bus that rolled through a stop sign 4 years ago. some minor fractures, a lot of bruising/road rash, and a couple deep gashes, but i was extremely lucky/blessed to be able to walk away from it. the bike was killed. the bus was fine.

i don't keep mileage stats because i'm not a stat person, but that's one serious accident in roughly 8 years of near daily bike commuting. if i had to ballpark it, i'd say maybe 35,000 miles.