CBP data indicates that there are more establishments categorized as health care and social assistance businesses with 500 or more employees in the U.S. than in any other category.
The following table shows how many utilities with 500 or more employees were in the U.S. during the period from 2012 to 2016.
Utilities with 500 or more employees in the U.S. (2012-2016)
Year
Total businesses
2012
35,666
2013
36,008
2014
35,924
2015
35,980
2016
36,318