An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Excel | CSV
1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 Total all sources 7.56 7.32 7.20 7.15 7.54 6.93 6.73 6.26 6.26 6.81 8.18 7.38...Excel | CSV
1970 1975 1980 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 Total all sources 13.02 7.56 7.01 41.32 40.53 40....Excel | CSV
1970 1975 1980 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 Total all sources 34.66 30.76 31.11 27.40 26.79 26....Excel | CSV
1970 1975 1980 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 TOTAL all sources 26.88 26.38 27.08 25.76 25.42 25.58 26.07 25...Excel | CSV
1970 1975 1980 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 TOTAL all sources 204.04 188.40 185.41 176.84 173.67 172.97...Excel | CSV
1995 1996 1997 1998 1999 2000 2001 2002 2003 Light-duty vehicles ...Excel | CSV
1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 GASOLINE (assuming zero RFG) ...Excel | CSV
Engine categoryc Displacement (liters/cylinder) Rated power (kW) Year NOx + THC (g/kW-hr) PM (g/kW-hr) CO (g/kW-hr) Useful Lifed Warranty...Excel | CSV
Year HC + NOx (g/kWh) Warranty period Useful lifed Rated power < 4.3 kW Rated power >= 4.3 kW...Excel | CSV
Pollutant Duty-cycle f Tier 0 1973-2001h Tier 1 2002-2004 Tier 2 2005+ Total HCb Line-haul 1.00 0.55 0.30 Total HCb Switch 2.10 1.20 0.60 Nonmethane HCc...