Interesting stats. I am a numbers nut, so I've been studying this kind of stuff for probably 30 years. As you acknowledge, though, hard to say what the true numbers are because of not knowing how many booners are killed and never entered. I'd agree strongly with your conclusion that in states like Iowa and Kansas and provinces like Alberta and Saskatchewan, booners are much more common than other places and so not as big of a deal to enter them in "the book". And then you've got a guy like me who did not grow up in a big buck area, and while I have never killed a "net" booner yet, I have killed a number of nice P&Y bucks and I haven't entered them in the book because I just don't care to have them in there. I like to know what they score for myself, but I've never entered them, nor the antelope and mule deer I've taken that would make minimum.
I think where the numbers/stats get *really* interesting is when you take the numbers that you already posted, and then do an additional set of numbers that shows *how many licensed deer hunters* it took to get that number of boone & crockett bucks killed in each state/province. I don't know the numbers off-hand, but I guarantee that it took a lot more hunters in Wisconsin and Ohio, for instance, to kill that number of booners that were *entered* in the book, than it took hunters in Iowa. For example, just a quick Google search shows that in 2018 Ohio had 390,000 licensed hunters. In 2018, Iowa had 223,000 licensed hunters. And Wisconsin....you sitting down? In 2018, I saw an estimate where it said Wisconsin had close to 570,000 licensed hunters that year. I'd bet you just about anything that Iowa kills more booners *per hunter* than any state on the list, and maybe more than Alberta or Saskatchewan too.
I know you harp on this a lot, but if Wisconsin or Ohio or pretty much most any other midwest state (except the Dakotas) had the same regs as Iowa, *all* of those states would kick Iowa's butt in terms of the number of big bucks killed just because they have a much higher percentage of deer habitat.