Release: NBER Macrohistory Database
Series Is Presented Here As Two Variables--(1)--Original Data, 1875-1916 (2)--Original Data, 1911-1937. Data For 1911-1937 Are Based On The Calendar Year. Source: Data For 1875-1910: Letter From The Pullman Company. Data For 1911-1916: The Statistical Abstract Of The United States, 1924, P. 381.
This NBER data series a03010gb appears on the NBER website in Chapter 3 at http://www.nber.org/databases/macrohistory/contents/chapter03.html.
NBER Indicator: a03010gb
National Bureau of Economic Research, Revenue Passengers Carried for United States [A030GBUSA430NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/A030GBUSA430NNBR, December 15, 2017.