I don't keep track of that stat, but I would say I lose a ball every 45 - 54 holes. I have over a thousand scuffed, cart path marked, or other flight diversion marked balls in my garage. When I played Balata, I would use a three ball rotation through the round or down to two if I lost one. Then came Urethane covers and with my V grooves, one ball became my routine. Now with square grooves in most wedges and 4 sets of my irons, three - five piece non wound balls can last from 4 holes to 4 rounds. I find more balls than I lose, if the ball is perfect, then I put it in one of the ball pockets of my bag, if imperfect in any way, it goes into the box in the garage. My course is penal, 15 holes with OB, six of those on both sides, 8 holes with water in play, 76.1 / 142 from the tips. You learn to hit it straight, distance is good, but not at the expense of control.