Year thousand metric tons of CO2 equivalent 1970 10730.954966171894 1971 10773.744649765596 1972 11063.6228710937 1973 11880.493198593693 1974 12653.251566171897 1975 -26476.852340078098 1976 -23020.63795375 1977 -23951.144119765595 1978 -24903.627926015593 1979 -27366.82211546879 1980 -36652.2061975 1981 -39211.20842640629 1982 -41002.736356093796 1983 -42906.5630334375 1984 -45199.80759632809 1985 -48026.19371546879 1986 -49837.060637969 1987 -52134.9556575 1988 -52732.73612625 1989 -53928.57538406299 1990 -4883.141357422006 1991 -7467.442382812995 1992 -4994.915039062995 1993 -4386.686523437995 1994 -5940.820068358997 1995 -4733.578125 1996 -5059.295410156003 1997 -5589.912597656003 1998 -4781.513183593997 1999 -4783.264160156003 2000 1654.0952148439974 2001 1046.5590820310026 2002 -1762.4858398439974 2003 -3772.9423828129948 2004 2010.96484375 2005 69.529296875 2006 3310.3330078120052 2007 -756.75390625 2008 5443.338867187005 2009 7072.909179687005 2010 16562.291992187005 2011 11367.249023437005 2012 -4120.420410156003 2013 9410.620605468997 2014 553.4565429689974 2015 -4999.428222656003 2016 -867.3383789060026