Air transport, freight (million ton-km) - United States
Civil Aviation Statistics of the World, International Civil Aviation Organization ( ICAO ), uri: data.icao.int/newdataplus/#:~:text=ICAO%20data%20is%20comprised%20of,information%20about%20commercial%20air%20carriers;
ICAO Staff estimates, International Civil Aviation Organization ( ICAO ), uri: data.icao.int/newdataplus/#:~:text=ICAO%20data%20is%20comprised%20of,information%20about%20commercial%20air%20carriers
