CBP data indicates that there are more establishments categorized as professional, scientific and technical services businesses with between one and four employees in San Diego 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 San Diego County zip codes during the period from 2012 to 2016.
Transportation and warehousing businesses with between one and four employees in San Diego County (2012-2016)
Year
Total businesses
2012
874
2013
860
2014
885
2015
939
2016
941
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