Year thousand metric tons of CO2 equivalent 1970 789227.7887363073 1971 546328.3708355739 1972 1021260.1707612264 1973 1009944.3596214347 1974 598788.2807662502 1975 611197.752350647 1976 733738.6438575301 1977 1240578.4915501487 1978 1119255.8725783278 1979 1174615.6103881472 1980 1350501.5406096037 1981 1155620.4858685993 1982 2630174.1374942423 1983 2193705.3112008437 1984 1326149.9111865896 1985 1243881.3694490476 1986 1655120.1216160804 1987 2272641.5541630643 1988 1510820.3855383722 1989 1343669.8101150482 1990 -214227.13902959132 1991 -202481.71108403348 1992 -168256.90645770464 1993 -270248.09199915116 1994 -309347.6733176428 1995 -310949.19177710894 1996 -308643.3376850353 1997 -331294.8778897169 1998 -291653.92956169316 1999 -321066.54326730844 2000 -353225.1559089201 2001 -335091.5022615126 2002 -349785.1318003771 2003 -392670.98046850425 2004 -382918.45658587455 2005 -391576.53401009896 2006 -466978.24854413647 2007 -520154.70100415207 2008 -449518.8512618749 2009 -432611.52459970553 2010 -346724.3998021366 2011 -298439.93507833476 2012 -196200.0335764904 2013 -256927.5625333162 2014 -422242.75038981566 2015 -377673.7254587243 2016 -358912.43969612254