OK...got that one whipped. Attached is a summary of both fatal accidents at Oshkosh, and fatals where the NTSB report states the plane was going to or coming from the Fly-In. Dates are constrained to the fly-in period. Total was 66 fatal accidents from 1982 through 2013. This includes all types of airplanes, certified and experimental. A total of 110 lives were lost. Most years saw an Oshkosh-related accident *somewhere*.
I don't see any Cessna 172 crashes in your list. Not sure that is terribly meaningful given the nature of aircraft likely to fly in, but since there are more of that make and model than any others, it is still interesting.
