Editor's Notes:

• IATA (International Air Transport Association) represents 265 airlines comprising 94% of international scheduled air traffic.
• The IATA Billing and Settlement Plan operates in 71 countries for 390 airline and non-airline participants covering 150 countries and territories.
• Explanation of measurements:
  RPK: Revenue Passenger Kilometres measures actual passenger traffic
  ASK: Available Seat Kilometres measures available passenger capacity
  PLF: Passenger Load Factor is % of ASKs used. In comparison of 2004 to 2003, PLF indicates point differential between the periods compared.
  FTK: Freight Tonne Kilometres measures actual freight traffic
  ATK: Available Tonne Kilometres measures available total capacity (combined passenger and cargo)
• IATA statistics cover international scheduled air traffic; domestic traffic is not included.
• All figures are provisional and represent total reporting at time of publication plus estimates for missing data.
• Due to uncertainties in the adoption of the new ICAO statistical definitions by reporting carriers, care should be taken when making year comparisons.