Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Thousands of Messages, Not Seasonally Adjusted

Frequency:  Annual

Annual Totals Are Based On A Fiscal Year Ending June 30. Data Beginning 1903 Do Not Include Messages Sent Over Leased Wires Or Under Railroad Contracts. Data Are Originally From Annual Western Union Reports And Were Checked With Statistical Abstracts Of 1915, P. 267; 1920, P. 369. Source: Statistical Abstract Of The United States, 1910, P. 257. Data For 1911 And 1912 Were Estimated.

This NBER data series a03019a appears on the NBER website in Chapter 3 at http://www.nber.org/databases/macrohistory/contents/chapter03.html.

NBER Indicator: a03019a