Series Is Presented Here As Three Variables--(1)--Seasonally Adjusted Data, 1913-1940 (2)--Original Data, 1946-1953 (3)--Original Data, 1947-1956 Data Are Not Entirely Comparable With 1946-1953 Index In Which Coal Had A Weight Of Approximately 1/3 And Crude Petroleum About 2/3; Beginning 1947 Weight Of Coal=32.1%, Crude Petroleum=49.3% And Remainder Assigned To Natural Gas, Natural Gas Liquids And Oil And Gas Well Drilling That Were Not Included In Previous Index. Source: Federal Reserve Board, Federal Reserve Bulletin, December 1953, And Following Monthly Issues.
This NBER data series m01204c appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.
NBER Indicator: m01204c
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Production of Mineral Fuels for United States [M0104CUSM349NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0104CUSM349NNBR/, July 4, 2015.