NOTES: The
current value is compared to the value from the same period in the previous
year to account for seasonality.
Data for
January 2007 to May 2007 are preliminary due to late reports by carriers.
SOURCE: U.S. Department of Transportation, Research and
Innovative Technology Administration, Bureau of Transportation Statistics,
Office of Airline Information, August, 2007; available at: http://www.bts.gov/oai.