Got to be mid teens I'd guess
When most of them are pinches that's 2 a time and sometimes when they're a pinch at speed before I can come to a stop its pinched upto twice more making 6 holes before
Don't think I'll forget getting a pinch and 2 more before I could stop, getting attacked by midges, realising the valve on my (old) spare tube was coming away from the tube, then releasing I only had 2 patches. Que splitting the patches into 3 and a load more midge bites while I set about waiting for the vulcanising solution to dry ...
I'm moving to tubeless now though, first stans which works well, save any splits in the tyre, now ghetto, I'll see how well that goes down
When its downhill/freeride tubes at £7-11 a pop you've a bit more incentive to keep on fixing them tbf