It's misleading if you don't consider immigration from other Countries and Population growth from birth.Look at all the Stroller neighborhoods in NYC, especially Park Slope, Brooklyn.

People would post porch cam video showing a (white) middle-age woman pushing a baby stroller down someone's walkway in the middle of the day and stealing the mail out of their mailboxes.

Do you see moms walking their babies in strollers, children riding their bikes down the street, and guys washing their cars in the driveways or painting their garage door?

If your target customer is military families, make sure you have children proof amenities, a stroller for rent, toys for kids, Disney+ on TV, no sharp corners.

Even this isn't the full set of statistics that you need.BUT, adding Births, you will see that wealthier families that stay will have children that then have advantages because of their wealth and go on to stay in these cities and get those higher paying jobs.That would be in addition to the fact that the higher paying jobs also attract those who qualify for those kinds of jobs and their families, who then have children and so on.In NYC, so many neighborhoods have become what we call, "Stroller Neighborhoods."

There were 3 of our kids with us,all under 6, one of them in a stroller, one crying as was my wife!