Found my first one in Ohio today. It was from a 2 y/o 8 point. Huge chunk of skull with it and he had been rubbing. Maybe it was itching him and he busted it off. I found one like that at my house a few years ago and that summer we kept seeing a buck missing an antler on that side. He must have ripped off the pedicle.
Still a little early here. I'd say over 50-60% still have both antlers.