This indicates where the rate of enlistment is currently high or low.
That’s useful in itself, but of course it isn’t a complete picture and shouldn’t be required to be. It is what it is.
It says little about the overall composition of the military, as that also depends on where recruitment was in earlier times, and also on the pools of available young people. I.e., it is false to conclude that there are plenty of people from Maine in the military, because though the recruitment rate is high the actual numbers are small.
Interesting though that some of the more conservative states have relatively low rates. Why so few out of WV ? One would think its prime territory.
The military tend to put recruiters where there is a large population. The states that have a large military presence usually don’t need as many recruiters.
For example my graduating class in high school was over 1000. You have a larger pool to draw from.
They have also cut back on recruiting adverts so word probably not getting out to the sparsely populated areas.