Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Index 1957-1959=100, Seasonally Adjusted

Frequency:  Quarterly

Notes:

Series Is Presented Here As Two Variables--(1)--Seasonally Adjusted Data, Quarterly, 1946-1960 (2)--Seasonally Adjusted Data, Monthly, 1955-1964. Source: U.S. Bureau Of The Census; Originally From The American Trucking Association, Department Of Research And Transport Economics.

This NBER data series q03032 appears on the NBER website in Chapter 3 at http://www.nber.org/databases/macrohistory/contents/chapter03.html.

NBER Indicator: q03032