I'm know I've probably missed repairing a some where I land on the front and roll to the back or land on the green and roll off and get preoccupied with playing my shot. Most of the time though I repair mine and any bad ones that I see near me. I would say I average about 3 per green that I fix but I've been known to 7-10 before if I'm waiting for guys to chip from around the green.