Year thousand metric tons of CO2 equivalent 1970 141.5719288940445 1971 150.5506438770285 1972 137.42035450172534 1973 185.2600361366276 1974 190.44662289810276 1975 179.65655037689112 1976 158.77782509994677 1977 175.381325225831 1978 156.50451684570362 1979 158.3591103134172 1980 218.16516040420493 1981 204.13929182052698 1982 241.39840731048707 1983 247.4175675888073 1984 272.95822141265853 1985 255.95148338317722 1986 286.9449262695298 1987 65.41194296264894 1988 172.31650587463355 1989 178.02835359191886 1990 80.80818891525269 1991 147.0777792930603 1992 199.81429719924927 1993 219.4737753868103 1994 202.14582872390747 1995 217.64364004135132 1996 127.99147367477417 1997 -83.86857557296753 1998 -98.6305480003357 1999 -227.33832931518555 2000 -298.5801668167114 2001 -290.5372095108032 2002 -218.48681926727295 2003 -278.2769856452942 2004 -279.65420389175415 2005 -254.2185173034668 2006 -222.2289342880249 2007 -241.30266571044922 2008 -279.7796392440796 2009 -213.04416465758914 2010 -271.8748588562012 2011 -308.70266628265017 2012 -338.84831714630127 2013 -310.70303487778074 2014 -357.0656108856201 2015 -356.67217540740967 2016 -368.44170331954956