Source: U.S. Bureau of Labor Statistics
Release: Employment Situation
The series comes from the 'Current Employment Statistics (Establishment Survey).'
The source code is: CES4348600001
U.S. Bureau of Labor Statistics, All Employees: Transportation and Warehousing: Pipeline Transportation [CES4348600001], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/CES4348600001, March 22, 2018.