CBP data indicates that there are more establishments categorized as retail trade businesses with between one and four employees in 91911 than in any other category.
The following table shows how many construction businesses with between one and four employees were in 91911 during the period from 2012 to 2016.
Construction businesses with between one and four employees in 91911 (2012-2016)
Year
Total businesses
2012
56
2013
60
2014
60
2015
51
2016
63