Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Train-Miles per Train-Hour, Not Seasonally Adjusted

Frequency:  Monthly

Notes:

Source: Data For 1920-1931: Ministry Of Transport, "Railway Statistics". Data For 1931-1939: Computed By NBER By Dividing Series 03078 (Freight Train-Miles) By Series 03080 (Freight Train-Hours). Data For 1947-1952: From NBER Files.

This NBER data series m03081 appears on the NBER website in Chapter 3 at http://www.nber.org/databases/macrohistory/contents/chapter03.html.

NBER Indicator: m03081