And of course most of those leaving will be the adult wage earners of childbearing age. They're still having kids, they just aren't having them in the central city so much.
This trend has been going on for many years btw, even during the "Boom" times of the 90's.
Unfortunately, too many Clevelanders and Pittsburghers have landed in Columbus and turned it a darker shade of blue. This city was candy apple red 20 years ago.