Ok, so I had to look this up.
https://www.carinsurance.com/Articles/odds-of-hitting-deer.aspx
WY is shockingly high (#6?!), but WV is #1: PA is also really high (#3). Iowa is #5, MI, MT and WI are high.
CO is #41.
If you are in the plains, deer are far away and easy to spot. If in mountains, deer are rarely seen. Desert southwest near UT? Don't see too many deer. Hot and dry.
Still can't understand what they are doing, unless it's a localized problem, say in the Jackson Hole /Teton area.
Edit: got stuck deep diving
Yellowstone/Teton/Jackson is in NW. Cody is also dangerous.
State map of high strike areas