Beginning With 1948, Export Includes Shipments Under Department Of The Army Civilian Supply Program; Indexes For Periods Prior To 1948 Exclude These Shipments. 1953 Figures Were Taken From The Survey Of Current Business; Should Be Checked With The Quarterly Summary Of Foreign Commerce Data. Source: Survey Of Current Business, July 1951, Pp. 27-28 For 1929-1949; Current Issues Of Quarterly Survey Of Foreign Commerce, Thereafter.
This NBER data series q07048 appears on the NBER website in Chapter 7 at http://www.nber.org/databases/macrohistory/contents/chapter07.html.
NBER Indicator: q07048
Release: NBER Macrohistory Database
National Bureau of Economic Research, Quantity Index of Exports of Domestic Merchandise for United States [Q07048USQ345NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/Q07048USQ345NNBR/, October 9, 2015.