Source: U.S. Bureau of Labor Statistics
Release: Industry Productivity
Unit labor costs represent the cost of labor required to produce one unit of output. The unit labor cost indexes are computed by dividing an index of nominal industry labor compensation by an index of real industry output.
U.S. Bureau of Labor Statistics, Unit Labor Costs for Mining: Coal Mining (NAICS 21211) in the United States [IPUBN21211U101000000], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/IPUBN21211U101000000, January 18, 2022.