That is an interesting document. I did not know about it. I will say that the absolute numbers are higher than I expect, but the relative numbers are around the ballpark of 1%. And depending what is counted maybe ~2% which seems to me that the problem itself is not as big as it seems to me people are making it to appear. It does not seem to be foreigners are trying to overtake or abuse the country systematically as the it has been said by some. Is my reading of the situation same as yours?

So for Visa Waiver countries one of the requirements is to keep that number under 1% or so to stay in the visa waiver program. For visa required countries, if the visa vetting process wasn't so strict, probably the numbers would be a lot higher.