An odds ratio is a bad way to look at it from a herd standpoint. Good for insurance company odds though.
For example Ohio has 7.9 million licensed drivers with an odds ratio of a DVA at 1:132. But Alabamas ratio is 1:136 with half the number of licensed drivers at 3.9 million and roughly the same huntable land mass.
The real number we need to look at is number of DVAs per year compared to licensed drivers. I'll do that when I have time. Somewhere Ryan and I had DVA data going back 20 years.