Series Is Presented Here As Two Variables--(1)--Original Data, 1919-1946 (2)--Original Data, 1933-1955 Data Represent Output From Domestic And Foreign Material Including Secondary Copper Produced At Primary Refineries. North And South America Refers To The United States And Chile Through 1925 And Canada Beginning In 1926. Beginning In 1939 Only U.S. Production Is Covered. Data From October 1924-June 1925 Were Prorated From Quarterly Totals. Published Totals For 1945 And 1946 Have Been Revised To Eliminate 2,140 Tons 9,712 Tons Respectively; These Quantities Cannot Be Allocated To Monthly Figures. Source: Data For 1919-1926: Record Book Of Business Statistics, Part Ii, P. 48. Data For 1927-1946: American Bureau Of Metal Statistics Yearbook.
This NBER data series m01247a appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.
NBER Indicator: m01247a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Refined Copper Production for North and South America [M0147A43M601NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0147A43M601NNBR, February 13, 2016.