Source: US. Bureau of the Census
Release: Annual Services Survey
For further information, please refer to the US Census Bureau's Annual Services release, online at http://www.census.gov/services/.
US. Bureau of the Census, Sources of Revenue: Power Generation and Distribution Engineering Projects for Engineering Services, All Establishments, Employer Firms [REVPGDEF54133ALLEST], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/REVPGDEF54133ALLEST, August 24, 2016.