CBP data indicates that there are more establishments categorized as retail trade businesses with between one and four employees in 66604 than in any other category.
The following table shows how many finance and insurance businesses with between one and four employees were in 66604 during the period from 2012 to 2016.
Finance and insurance businesses with between one and four employees in 66604 (2012-2016)
Year
Total businesses
2012
47
2013
46
2014
43
2015
42
2016
36