Most of Columbus' annual population gains are international imports.
Large companies, engine maker Cummins Inc. in particular, attract talent from around the world who move to Columbus, the Fortune 500 company's global headquarters.
Domestically, Columbus loses a little more population than it gains each year, with natives to the south-central Indiana city leaving annually.
But some of them decide to return — for job opportunities, because of lasting community ties, stronger support groups or simply a longing for home.
For more on this story, see Friday's Republic.