CBP data indicates that there are more establishments categorized as retail trade businesses with between one and four employees in 21231 than in any other category.
The following table shows how many professional, scientific and technical services businesses with between one and four employees were in 21231 during the period from 2012 to 2016.
Professional, scientific and technical services businesses with between one and four employees in 21231 (2012-2016)
Year
Total businesses
2012
38
2013
36
2014
36
2015
39
2016
42