a Includes motorcycles through 1989.
Since 1979, the average fuel rate of passenger cars, vans, pickup trucks, and sport utility vehicles have had an upward trend. In the 1990s, the fuel rates reached a more stable trend, and are now better than a decade ago. The fuel rates for trucks have not changed significantly. (The average fuel rate is calculated by dividing fuel consumption by mileage of a motor vehicle.)
|Average Motor Vehicle Miles Per Gallon||1998||1999|
|Percent change from previous year||0.47||-0.93|
|Vans, Pickup trucks, SUVs||17.2||17.1|
|Percent change from previous year||0||-0.58|
|Percent change from previous year||-4.69||0|
SOURCES: U.S. Department of Energy, Energy Information Administration, Monthly Energy Review. Available at http://www.eia.doe.gov/mer