| Type of carrier | December 2000 | December 2001 | December 2002 | December 2003 | December 2004 | Percentage change1 |
|---|---|---|---|---|---|---|
| Network | 399,971 | 348,882 | 334,444 | 286,940 | 276,812 | -31% |
| Low cost | 54,746 | 53,258 | 59,803 | 64,048 | 64,172 | 17% |
1 Among those airlines reporting in 2000 and 2004.
Source: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Certified Carriers (Full-time and Part-time), available at www.bts.gov/programs/airline_information/number_of_employees.