Years, unless noted
|All commercial aircraft||11.2||11.3||11.6||12.2||12.4||13.2||13.5||13.6||12.9||12.8||12.3|
|Major airlines aircraft||10.7||10.5||10.4||10.8||11.3||12.3||12.4||12.3||11.8||11.8||11.6|
|Major airlines share of commercial aircraft (percent)||86.8||84.1||82.1||79.9||76.1||72.5||78.7||77.8||78.5||78.8||82.9|
NOTES: Commercial aircraft are aircraft of air carriers providing scheduled or nonscheduled passenger or freight service, including commuter and air taxi on-demand services. Major airlines includes only commercial airlines with operating revenues greater than $1 billion annually. In 2001 they were: America West Airlines, American Airlines, American Eagle Airlines, America Trans Air, Alaska Airlines, Continental Airlines, Delta Airlines, Federal Express, Northwest Airlines, Southwest Airlines, Trans World Airlines, United Airlines, United Parcel Service, and US Airways. Average aircraft age is based on the year that an aircraft was delivered to the original owner from the manufacturer. It does not reflect the age of the engines or other parts that may have been replaced more recently.
SOURCE: U.S. Department of Transportation (USDOT), Bureau of Transportation Statistics (BTS), calculations based on USDOT, BTS, Form 41, Schedule B-43, 1991-2001.