|Number registered (thousands)||3,681||4,232||4,374||4,593||4,487||4,481||4,370||4,408||4,906||5,024||5,266||5,293||5,735||5,763||5,926||5,704||5,651|
|Fuel consumed (million liters)||15,021||20,517||26,206||28,008||31,635||30,934||31,180||32,131||34,190||34,886||35,617||36,249||25,807||35,477||36,200||R36,595||39,010|
|Average kilometers traveled per vehicle (thousands)||11.8||13.2||14.6||15.9||18.6||19.0||19.9||20.7||20.1||20.1||19.6||20.3||19.1||19.6||19.1||20.4||21.6|
|Average kilometers traveled per liter||2.9||2.7||2.4||2.6||2.6||2.8||2.8||2.8||2.9||2.9||2.9||3.0||4.2||3.2||3.1||3.2||3.1|
|Average fuel consumed per vehicle (liters)||4,080||4,848||5,992||6,098||7,050||6,904||7,135||7,289||6,968||6,944||6,763||6,848||4,500||6,156||6,109||R6,416||6,904|
KEY: R = revised.
a Beginning in 1998, the Federal Highway Administration (FHWA) used the Census Bureau's 1997 Vehicle Inventory and Use Survey (VIUS) for its baseline estimate of single-unit 2-axle 6-tire or more trucks. Prior to 1998, the FHWA used the Census Bureau's 1992 Transportation Inventory and Use Survey (TIUS) for its baseline estimates. Therefore, post-1997 data may not be comparable to 1997 and earlier years.
NOTES: In 1995, the U.S. Department of Transportation, Federal Highway Administration revised its vehicle categories beginning with 1993 data to include passenger cars, other 2-axle 4-tire vehicles, single-unit 2-axle 6-tire or more trucks, and combination trucks. Single-unit 2-axle 6-tire or more trucks are on a single frame with at least 2 axles and 6 tires. Pre-1993 data have been reassigned to the most appropriate category.
1.609344 kilometers = 1 mile.
3.785412 liters = 1 gallon.
SOURCES: 1970-94: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics Summary to 1995, FHWA-PL-97-009 (Washington, DC: July 1997), table VM-201A.
1995-2002: Ibid., Highway Statistics (Washington, DC: Annual issues), table VM-1.