Year thousand metric tons of CO2 equivalent 1970 63.62810058594005 1971 65.68494506835941 1972 -2.7710742187498454 1973 -6.465056152340594 1974 0.9969189453090621 1975 21.264497070310426 1976 14.755344238280031 1977 11.576289062501019 1978 26.57629638672006 1979 36.138969726560845 1980 60.84411621093932 1981 67.28704589843983 1982 60.410083007810954 1983 86.14895019529877 1984 97.91210937500182 1985 103.5932128905979 1986 94.60898437499827 1987 62.35568847659988 1988 151.4000000000019 1989 169.76201171870025 1990 -855.8273925780995 1991 -647.8520507812991 1992 -806.6333007812991 1993 -87.59204101559953 1994 -62.129638671900466 1995 -27.177001953099534 1996 23.333984375 1997 57.966796875 1998 63.93310546869907 1999 18.55029296869907 2000 106.94018554690047 2001 12.149902343699068 2002 352.99658203119907 2003 711.8312988280995 2004 475.85766601559953 2005 198.49877929690047 2006 423.95971679690047 2007 184.34033203119907 2008 54.8671875 2009 715.3989257811991 2010 2346.133300781199 2011 2060.359863281199 2012 1949.2158203125 2013 2054.3046875 2014 2532.955078125 2015 1501.8876953125 2016 704.0354003905995