Table 4-13M:  Single-Unit 2-Axle 6-Tire or More Truck Fuel Consumption and Travel a,,,,,,,,,,,,,,,
,1970 ,1975 ,1980 ,1985 ,1990 ,1991 ,1992 ,1993 ,1994 ,1995  ,1996   ,1997  ,   R1998  ,1999  ,2000  
Number registered (thousands),"3,681","4,232","4,374","4,593","4,487","4,481","4,370","4,408","4,906","5,024","R5,266","5,293","5,735","5,763","5,926"
Vehicle-kilometers (millions),"43,613","55,683","64,052","73,064","83,525","85,134","86,744","91,411","98,653","100,914","R103,114","107,654","109,469","113,143","113,592"
Fuel consumed (million liters),"15,021","20,517","26,206","28,008","31,635","30,934","31,180","32,131","34,190","34,886","R35,613","36,249","25,805","35,477","36,143"
Average kilometers traveled per vehicle (thousands),11.8,13.2,14.6,15.9,18.6,19.0,19.8,20.7,20.1,20.1,19.6,20.3,19.2,19.6,19.2
Average kilometers traveled per liter,2.9,2.7,2.4,2.6,2.6,2.8,2.8,2.8,2.9,2.9,2.9,3.0,4.3,3.2,3.1
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","R6,765","6,848","4,501","6,155","6,098"
KEY:  R = revised.,,,,,,,,,,,,,,,
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"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.",,,,,,,,,,,,,,,
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"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. ",,,,,,,,,,,,,,,
Numbers may differ slightly from previous year's metric tables because a higher precision conversion factor was used.,,,,,,,,,,,,,,,
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"SOURCES:  1965-94:  U.S. Department of Transportation, Federal Highway Administration, Highway Statistics Summary to 1995, FHWA-PL-97-009 (Washington, DC:  July 1997), table VM-201A. ",,,,,,,,,,,,,,,
"1995-2000: Ibid., Highway Statistics (Washington, DC:  Annual issues), table VM-1.",,,,,,,,,,,,
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