CBP data indicates that there are more establishments categorized as retail trade businesses with between one and four employees in 21215 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 21215 during the period from 2012 to 2016.
Professional, scientific and technical services businesses with between one and four employees in 21215 (2012-2016)
Year
Total businesses
2012
40
2013
37
2014
42
2015
52
2016
51