CBP data indicates that there are more establishments categorized as construction businesses with between one and four employees in 30518 than in any other category.
The following table shows how many transportation and warehousing businesses with between one and four employees were in 30518 during the period from 2012 to 2016.
Transportation and warehousing businesses with between one and four employees in 30518 (2012-2016)
Year
Total businesses
2012
15
2013
21
2014
23
2015
27
2016
32