In Wyoming’s case, maybe its because a great percentage of her oil, gas and coal are on Fed land, not to mention Yellow Stone would come under Federal expenditure within the State?
I think the fact that’s it 48th in GDP probably has more to do with it. Despite being comparable in size to Colorado, Wyoming barely outproduces tiny Vermont.
Sherman Logan posted more current information than I have, and although I believe it’s calculated differently (Looks like fed expenditures for fed lands within a state aren’t counted on his) it is probably more accurate for our purposes.