[87] National Highway Traffic Safety Administration, Summary of Fuel Economy Performance (Washington, DC, March 2004).

[88] National Highway Traffic Safety Administration, Automotive Fuel Economy Program Annual Update Calendar Year 2002 (Washington, DC, September 2003), Table II-4.

[89] U.S. Environmental Protection Agency, Light-Duty Automotive Technology and Fuel Economy Trends: 1975 Through 2004 (Ann Arbor, MI, April 2004), Table E-3.

[90] S.C. Davis and S.W. Diegel, Transportation Energy Data Book Edition 24, ORNL-6970 (Oak Ridge, TN: Oak Ridge National Laboratory, October 2003), Table 4.9.