Year thousand metric tons of CO2 equivalent 1970 2257873.834268333 1971 1426052.6922840667 1972 1580121.2895269594 1973 1861583.5760521146 1974 1407645.0369809202 1975 1557402.295821032 1976 1429984.0691046773 1977 1782319.7367301607 1978 1939990.1509134613 1979 2209596.836226151 1980 2116437.737279713 1981 1852829.2684543885 1982 2004324.3735711076 1983 2549160.4121161774 1984 1809063.7437290782 1985 1701251.5926930585 1986 1727360.097081332 1987 2285802.1584207807 1988 1744983.1342919413 1989 1635434.4776142915 1990 -7789.551687424126 1991 -10024.369959425183 1992 -11757.382224895651 1993 -10921.074015185124 1994 -13947.847890224723 1995 -12230.647623315386 1996 -13830.307259026738 1997 -15489.189677797807 1998 -13051.305561040215 1999 -13050.015261509077 2000 -11102.609551160975 2001 -11634.566555887712 2002 -10213.249228187198 2003 -8349.176557478928 2004 -5467.560993372437 2005 -5144.471238262697 2006 -1996.3073829627133 2007 814.3459603730229 2008 646.8265189438744 2009 6611.323905864248 2010 7263.9444120960925 2011 17220.302824414444 2012 22249.476307623416 2013 20115.14696405075 2014 24988.906713362747 2015 25340.113765273287 2016 35766.880188096315