Westchester County executive candidate Rob Astorino angered more than a few people when he seemed to blame an influx of illegal immigrants and Bronxites for driving up local property taxes. These groups “need services,” he said on News 12. Setting aside the complex issues of services — who’s eligible for them, who receives them and who pays for them — the candidate was onto one thing: Westchester receives more people from the Bronx than from any other county in the United States.

The Bronx accounts for the biggest group of newcomers, with household incomes averaging around $50,000. But another sizeable group comes from Manhattan, with incomes approaching $200,000.

Tim Henderson from the Journal News data desk generated this chart by looking at IRS records showing county-to-county migration, based on tax returns. (This would not reflect people moving in internationally, or people who don’t file tax returns.) The final column shows how quickly incomes are rising in each group. Incomes are much lower on average among the Bronx group, along with those from Putnam and Queens. Whether they “need services” as a group remains open to debate. One could argue that the Manhattanites and hedge-fund types coming from Fairfield, Conn., are helping to drive up housing prices and therefore, taxes. But I wouldn’t expect that debate to end any time soon.