Some Cities Have More Children Than Their Suburbs

Today, I read a blog post by Joel Kotkin asserting, for the umpteeth time, that famlies with children prefer suburbs.  But at the bottom of the post is a chart comparing the child population (as a percentage of total population) for dozens of cities and their suburbs.

And guess what?  Children are actually a higher percentage of the urban population than of the suburban population in many places, including not only Sun Belt metros like Jacksonville, Oklahoma City and Orlando, but unlikely suspects like Buffalo, Cleveland, Hartford, Milwaukee, Providence, and Rochester. 

Does this mean Rust Belt cities are especially child-friendly?  My guess is that it means that poorer people have more children, and these poor, declining cities are full of poor children.