Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Millions of Long Tons, Not Seasonally Adjusted

Frequency:  Annual, End of Year

Series Is Presented Here As Three Variables--(1)--Original Data, 1889-1915 (2)--Original Data, 1911-1946 (3)--Original Data, 1943-1955. Coverage Does Not Include Ore Containing Five Percent Or More Manganese. Source: U.S. Bureau Of Mines, Mineral Resources And Minerals Yearbook

This NBER data series a05086 appears on the NBER website in Chapter 5 at http://www.nber.org/databases/macrohistory/contents/chapter05.html.

NBER Indicator: a05086