NOTE: The U.S. data were converted from short ton-miles to ton-kilometers. To convert short ton-miles to metric ton-kilometers, first multiply by 1.61 (for kilometers) and then divide by 1.1 (for metric tons).
SOURCES: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics (BTS), based on data from various sources. World-International Civil Aviation Organization (ICAO), special tabulations, Sept. 28, 2009. United States- USDOT, RITA, BTS, Office of Airline Information, TranStats. Tonnage- BTS Transtats, T100-Segment data (U.S. carriers only). Ton-kilometers- BTS, Transtats, T2-U.S. Air Carrier Traffic and Capacity Statistics, available at www.bts.gov as of Dec. 2, 2009.