Source: US. Bureau of Labor Statistics
Release: Employment Situation
The series comes from the 'Current Employment Statistics (Establishment Survey).'
The source code is: CES4348200001
US. Bureau of Labor Statistics, All Employees: Transportation and Warehousing: Rail Transportation [CES4348200001], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/CES4348200001, August 25, 2016.