Year thousand metric tons of CO2 equivalent 1970 177.1245693359383 1971 235.80127636718976 1972 247.69888037109035 1973 235.49828918456933 1974 291.3779482421901 1975 298.5732397460895 1976 255.24198864745995 1977 318.6872655029299 1978 335.9517281494111 1979 502.89580126952956 1980 422.05835595703 1981 335.6139152832011 1982 597.1232180175805 1983 407.57292578125 1984 464.3967141113301 1985 482.0652282714789 1986 527.1868369140607 1987 -422.3563544921892 1988 602.1564707031184 1989 513.1192534179722 1990 -115.60290527344023 1991 -126.46447753906068 1992 -80.91314697265989 1993 -52.22705078125 1994 -45.559814453099534 1995 -57.77874755859921 1996 -55.6048583983993 1997 -7.158081054700233 1998 225.28051757809953 1999 -46.208251953099534 2000 351.33081054690047 2001 972.7911376953016 2002 1294.2059326171984 2003 -583.8043212890989 2004 -1919.7840576171984 2005 -280.03881835940047 2006 -344.7489013671984 2007 -69.34533691409888 2008 -872.30078125 2009 -98.28833007809953 2010 558.7227783203016 2011 -687.8293457030995 2012 -467.74731445309953 2013 -524.7119140625 2014 -1.1363525390988798 2015 1679.597167968699 2016 2133.2604980469005