I'm not convinced that's how the math works. I can just as easily conclude that if all 95% of the non-handicapped population is using only 10% of the non-handic

I'm not convinced that's how the math works. I can just as easily conclude that if all 95% of the non-handicapped population is using only 10% of the non-handicapped spots at any one time, we would only need 9.5% of a parking lot to be non-handicapped spots.