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Person Miles Person Trips Number (billions) Percent of miles Number (millions) Percent of trips Walking 26,202 0.65 35,326 8.60 Bicycling 6,195...Chained 2000 dollars
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1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 Vehicle purchases 2,517 2,569 2,889 2,693 2,820 2,...Billions of current dollars
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1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Highway 33.2 33.5 33.6 35.4...Excel | CSV | Graphic Version
Mode or source Percentage of total All oil spills (gallons) Maritime tank vessels 37.4 7,245,027 Maritime no tank and other vessels 18.5 3,584,388 Maritime...Millions
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1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 Air 350,185 365,564 372,130 398,199 414,688 446,652 463,112 476,362...Millions of unlinked trips
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1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 Bus 4,748.5...Million barrels per day
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1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 Transportation 10.9 11.1 11.4 11.7 11.9 12.1 12.4 12.8 13....Billions of chained 2000 dollars
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1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 State and local...Percent
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CO NOx VOC PM-10 Highway gasoline 92.9 41.7 74.7 27.1 Highway diesel 1.4 37.5 3.6 37.8 Aircraft 5.1 0.8 0.3 0.9...Millions of current dollars
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Overall (exports plus imports) Balance (exports minus imports) Vehicles other than railway 233,027 -108,005 Aircraft,...