* The number of counties reporting data increased sharply from 2004 to 2005, causing the median value of the data to drop for some data series in the Nonemployer Statistics.Median value may also be affected by the number of zero values reported, particularly in 2010 and 2011.
Years Available: 2002–2016
Permanent Link: http://data.sagepub.com/sagestats/5367
General Notes: *Median value gives the value for the "average" county for this metric, the 50th percentile of all counties reporting data. **NAICS code 21. Prior to 2007, NAICS code 21, Mining, Quarrying, and Oil and Gas Extraction was known simply as Mining.