Release: NBER Macrohistory Database
Data Given As Of June 30 In Thousand Gross Tons. Gross Ton = Capacity Of Space Within Frames And Ceiling Of Hall And Closed In Spaces Above Deck Available For Cargo, Stores, Passengers, And Crew Expressed In Tons Of 100 Cubic Feet. Source: U.S. Bureau Of Navigation, Department Of Commerce, "Merchant Marine Statistics", 1935, Pp. 24-26 And Later Issues.
This NBER data series a02135 appears on the NBER website in Chapter 2 at http://www.nber.org/databases/macrohistory/contents/chapter02.html.
NBER Indicator: a02135
National Bureau of Economic Research, Total Merchant Marine for United States [A02135USA561NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/A02135USA561NNBR, December 10, 2019.