Year thousand metric tons of CO2 equivalent 1970 7027.547900066379 1971 5137.64691831589 1972 5998.140715484619 1973 5253.153162117 1974 5590.473115444179 1975 6018.687860126501 1976 6989.467275886539 1977 5616.48241455078 1978 6746.329656486509 1979 7067.6164979553205 1980 7520.76504444122 1981 7377.25467823029 1982 7666.051865081792 1983 7689.270830307009 1984 6043.63001331329 1985 6283.46311012268 1986 6447.076670684811 1987 7336.963360595701 1988 6274.23486572266 1989 6471.982868652339 1990 251.31253051757994 1991 513.03090667725 1992 555.75780105591 1993 668.456199646 1994 677.57604598999 1995 614.2439575195301 1996 587.0575637817401 1997 649.65659713745 1998 562.4900283813499 1999 601.5271835327101 2000 -214.13753128052008 2001 -307.8820075988799 2002 -744.0270328521699 2003 -658.68995475769 2004 -442.18515014648005 2005 -100.67701339721998 2006 -282.15955924988 2007 -447.7617950439501 2008 -363.42879867554007 2009 -397.62427520752 2010 -196.2301502227799 2011 -132.62517356873013 2012 348.60498428345 2013 244.58180618285996 2014 574.2195549011199 2015 684.0282440185501 2016 237.06693267821993