CBP data indicates that there are more establishments categorized as professional, scientific and technical services businesses with between one and four employees in 31401 than in any other category.
The following table shows how many retail trade businesses with between one and four employees were in 31401 during the period from 2012 to 2016.
Retail trade businesses with between one and four employees in 31401 (2012-2016)
Year
Total businesses
2012
116
2013
117
2014
127
2015
119
2016
124