CBP data indicates that there are more establishments categorized as construction businesses with between one and four employees in 91701 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 91701 during the period from 2012 to 2016.
Professional, scientific and technical services businesses with between one and four employees in 91701 (2012-2016)
Year
Total businesses
2012
37
2013
43
2014
50
2015
44
2016
50