CBP data indicates that there are more establishments categorized as retail trade businesses with between one and four employees in 99901 than in any other category.
The following table shows how many real estate, rental and leasing businesses with between one and four employees were in 99901 during the period from 2012 to 2016.
Real estate, rental and leasing businesses with between one and four employees in 99901 (2012-2016)
Year
Total businesses
2012
23
2013
19
2014
21
2015
21
2016
22