CBP data indicates that there are more establishments categorized as construction businesses with between one and four employees in Frederick County zip codes than in any other category.
The following table shows how many transportation and warehousing businesses with between one and four employees were in Frederick County zip codes during the period from 2012 to 2016.
Transportation and warehousing businesses with between one and four employees in Frederick County (2012-2016)
Year
Total businesses
2012
47
2013
46
2014
52
2015
45
2016
44