CBP data indicates that there are more establishments categorized as professional, scientific and technical services businesses with between one and four employees in the U.S. than in any other category.
The following table shows how many couriers and messengers with between one and four employees were in the U.S. during the period from 2012 to 2016.
Couriers and messengers with between one and four employees in the U.S. (2012-2016)
Year
Total businesses
2012
13,613
2013
13,633
2014
13,864
2015
14,853
2016
14,665