Labor statistics show that foreign-born workers account for all net gains in U.S. employment in the past seven years, according to a group that advocates low immigration.

The Center for Immigration Studies issued a report Friday that found 1.5 million fewer U.S.-born workers employed in 2014 than prior to the recession in 2007. Foreign-born employment for both legal and illegal immigrants increased by more than 2 million workers during the same time period.