We have the Americade annually here in eastern upstate NY. There are always at least a couple of fatalities.
The numbers are: 2% of registrations, 6% of fatalities. I was in a race shop in Seaside, CA and saw a great looking race bike, and asked a guy working there whose it was. "It's mine." "What do you ride on the street?" "I don't ride on the street. It's too dangerous."