I bet it is higher than 50%. Getting shot by a hunter is probably the easiest death for a rabbit. I suppose some are trapped - that can’t be too much fun. Dogs, wolves, owls, lynx, etc. are probably the worst way to go. I’m guessing not too many rabbits die of old age and curl up under a log and drift off to their final sleep. Sucks to be at the low end of the food chain. As a kid growing up in Minnesota I shot many rabbits. (Mom would cook them up though!)
When eagles pray “Give us this day our daily bread,” what they mean is, mice.