On this subject, you might find this graphic interesting.

I keep the database for my high school class, Putnam City Class of 1978. This was the last year before PC North opened; we had almost 900 graduate.

You can see that almost half the class (including yours truly) now live out of state. This really accelerated in the late 80's and 90's when the economy went in the tank... I know at our 10-year in 1988 fully 75% still lived in Oklahoma (once again, including yours truly).

The large majority of my class are college educated, as in the 70's PC schools were second to none in Oklahoma. In fact, almost all the people who no longer live in the state have college degrees, many of them advanced. Much more highly educated in general than the half that never left OK.