Ten years ago there was no hole in our planets ozone layer. It is hard to estimate the true thickness of the ozone layer because it is stretched so thin. It has been estimated that the if the entire ozone layer were compressed under atmospheric pressure at sea level, it would only be a third of an inch thick.
Lets do some math.
1200 cubic ft. That appears to be the amount needed to create the present hole. I can assure you that every refrigerator and Air-conditioner manufactured over 30 years ago is most likely in the scrap heap by now, and its freon is long gone. If there are 100 million households in America, that is about 150 million lbs. They use less now for each unit.