1936-1940 Data Were Computed From Data In Statistics Of Income. The Figure For 1938 Given Here Is Adjusted To Conform To The 1937 Industrial Classification. The Figures For 1939 And 1940 Have Been Adjusted To Conform To The 1938 Standard Industrial Classification. The Figure For 1938, If Adjusted To The 1938 Standard, Would Be 25.40. Source: Bureau Of Internal Revenue, Statistics Of Income
This NBER data series a09010 appears on the NBER website in Chapter 9 at http://www.nber.org/databases/macrohistory/contents/chapter09.html.
NBER Indicator: a09010
Release: NBER Macrohistory Database
National Bureau of Economic Research, Net Income, Agricultural Corporations Reporting for United States [A09010USA144NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/A09010USA144NNBR/, November 28, 2015.