Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Millions of Current Dollars, Not Seasonally Adjusted

Frequency:  Annual

Source: Data Furnished Directly To NBER By American Telephone & Telegraph Co.

This NBER data series a02134b appears on the NBER website in Chapter 2 at http://www.nber.org/databases/macrohistory/contents/chapter02.html.

NBER Indicator: a02134b