Do most students who don’t join frats decide to live on campus for all four years? What percentage of sophomores, juniors, and seniors live on campus?
I don’t know the answer to your particular question, but when we were on a MiamiU tour, our guide talked about moving off-campus (and keeping a partial meal plan, I think) saying that many undergrads do so. She was quick to point out the numbers of houses across the road from campus, most of which had names. I got the feeling it is fairly common there.
Freshmen and sophomores are required to live on campus. The vast majority of juniors and seniors live off campus.