I think this all also depends on what you consider a crash. I know one or two guys who consider anything you can't taxi back a crash of some sort. Personally, I don't consider it a crash unless the plane has to go home for repairs.
As for the plane expiration date, I do think they all have them if you fly them long enough. It may not occur while you have it but if it gets flown,something will eventually fail. In my case it used to be my piloting ability most of the time. Now I know enough to fly within the plane's and my limits. Doesn't keep things like a servo failure or dropping a cell in your Rx battery from happening, but that and a good preflight will go a long way in reducing the number of crashes you do have. I haven't totaled an airframe in several years if you don't count my electric 3D foamie stuff. But those are just for all the low slow dumb stuff that would be costly do screw up on with a built up plane.
I think our field averages about one crash a week. I think I have seen 4 or 5 in one day though