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Yearly averages Index: 1990 = 100.0
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1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000...Percent
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CO NOx VOC PM-10 Highway gasoline 91.8 42.1 73.1 28.4 Highway diesel 1.5 36.0 3.5 35.3 Aircraft 0.4 0.9 0.4 0.9...Excel | CSV | Graphic Version
Percentage of workers Number of workers (thousands) Drives self 79.4 91,607 Carpool 8.7 10,057 Mass transportation 4.4 5,081 Works at home 3.1 3,536...Excel | CSV | Graphic Version
1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Jet fuel price (chained 2000 dollars) 0.59 0.59 0.69 0.64 0.47...Excel | CSV | Graphic Version
Ton-miles (billions) Percent Air 13.6 0.3 Truck 1,255.4 28.8 Railroad 1,605.5 36.8 Water 612.1 14.0 Oil and natural gas pipeline 879.2...Excel | CSV | Graphic Version
Chained 2000 dollars (millions) Percentage of total Highway 83,947 68.8 Transit 12,989 10.6 Air 21,439 17...1993 = 100
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1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 Passenger cars 100 101 101 102 102 105 106 107 107 109...Percentage of scheduled flights
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1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 On-time flights 78.6 74.5 77.9 77.2 76.1 72.6 77.4 82....Index: 1991 = 100.0
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1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 Railroad transportation 100.0 106.4 109.8 112.2 118.8 123.2 123....Millions of current dollars
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1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Imports 105,754 110,781 115,504 126,927 140,054...