I don't have numbers but here is some anecdotal musing from an American. Sentiment-wise, I don't know anyone who supports the military anymore that isn't super conservative. The unfortunate thing for many, though, is military is sometimes the best option for getting your college paid for and making money. I was lucky enough to not have to, but for many it's a sacrifice they decide is worth it. They basically gamble that they won't have to go to war, or at least won't be deployed anywhere too dangerous, during the time they serve.

It's sad honestly, because our military is so grossly over funded it can be the only good paying job option for some people depending on their circumstances.