Year thousand metric tons of CO2 equivalent 1970 353.7927777659535 1971 366.1784305285809 1972 384.37169397347026 1973 407.6735533662197 1974 504.26036096892386 1975 425.10249372984083 1976 377.80618856580304 1977 317.06886700161726 1978 -57.01929157968757 1979 107.1362312526584 1980 755.1253947673074 1981 474.71622947616663 1982 613.9855436854007 1983 555.8151123377324 1984 256.4134273507895 1985 517.7593447464287 1986 575.6099832386011 1987 527.0600327329644 1988 740.030277209533 1989 875.6931692288811 1990 380.05048856267996 1991 437.46329167942554 1992 491.9116861404327 1993 494.6202911360776 1994 455.2317042634391 1995 466.29814470010956 1996 308.4304984346513 1997 548.9941004281862 1998 505.5087684800107 1999 520.6906904599865 2000 494.75024738249476 2001 732.2312496974413 2002 640.6620660188299 2003 695.3081381396855 2004 996.9044792746274 2005 797.9694226520731 2006 791.8263870086993 2007 777.337604399791 2008 331.65018294140464 2009 313.0203817738974 2010 310.36343820087296 2011 338.6214154246879 2012 210.91837930531395 2013 109.30460173170772 2014 204.66901135351907 2015 243.72857131249722 2016 551.4889099113697