Tax revenue for states was lower than expected in April, with the largest declines being posted in New England and Mid-Atlantic states, a report from the Rockefeller Institute of Government found.

In 11 states, collections from the personal income tax in April-May 2017 were lower than the same period in 2016.

New York had initially projected a 5.7 percent growth in capital gains last year, but ultimately revised that estimate to a 3 percentage point decline.

It’s not entirely clear what has led to the lowered revenue, though one possibility could be taxpayers shifting their income out of 2016 after Donald Trump’s election as president in order to benefit from the potential tax cuts he had pledged during the campaign.

The full report can be found here.