Figure 4: Changes in Flights and Taxi-Times (Indexed to 2003),,,,,,,, Year,Taxi-Out,Taxi-In,Airport Operations,,,,, 2003,1.00,1.00,1.00,,,,, 2004,1.04,1.03,1.05,,,,, 2005,1.03,1.03,1.06,,,,, 2006,1.05,1.06,1.03,,,,, 2007,1.09,1.11,1.04,,,,, "SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Airline On-Time Performance Database for taxi times, and T100 Segment Data for number of flights.",,,,,,,,