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 mining, quarrying, oil and gas extraction businesses with between one and four employees were in San Diego County zip codes during the period from 2012 to 2016.
Mining, quarrying, oil and gas extraction businesses with between one and four employees in San Diego County (2012-2016)
Year
Total businesses
2012
23
2013
24
2014
21
2015
17
2016
14
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