Nearly a third of U.S. apartment renters didn’t pay any of their April rent during the first week of the month, according to new data to be released Wednesday by the National Multifamily Housing Council and a consortium of real-estate data providers.

The numbers are the first hard look at how many Americans are struggling to make rent during the coronavirus pandemic. The data come in the first of weekly reports on unpaid rent from NMHC, a landlord trade group.