The U.S. built on average 276,000 fewer homes per year between 2001 and 2020 compared to the period between 1968 and 2000, according to the report which was covered earlier by the Wall Street Journal.

Had building continued at the same pace, there would be 5.5 million more units of housing, the report estimated.

To make up the shortage, the NAR report says the U.S. would have to build 2.1 million homes each year for a decade—more than it built each year during the housing boom of the mid-2000s.