Year thousand metric tons of CO2 equivalent 1970 308.6665921630859 1971 320.159768371582 1972 331.3741477813721 1973 356.7245425872802 1974 433.854027999878 1975 374.355754051208 1976 334.47427821350095 1977 283.88562109375 1978 17.6100857543951 1979 128.41579806518598 1980 622.337937774658 1981 368.4243447875982 1982 475.397254486084 1983 446.05884017944294 1984 211.21824142456092 1985 403.50688333129904 1986 442.47677050781215 1987 411.6921785583502 1988 541.1986263275151 1989 665.9773237609861 1990 149.2317276000981 1991 197.88365936279297 1992 286.0706329345701 1993 260.08971405029297 1994 203.2210426330571 1995 165.1695785522461 1996 174.55365371704102 1997 299.544502258301 1998 266.50829696655296 1999 274.136543273926 2000 319.46926021575905 2001 534.8382835388179 2002 310.8063583374019 2003 335.51202440261795 2004 642.9208402633672 2005 406.925991535187 2006 457.098356246948 2007 366.55332756042503 2008 -11.922369003299991 2009 -23.15008354186989 2010 35.88712310790993 2011 -101.72765541077001 2012 -216.69760322571005 2013 -231.8707771301299 2014 -127.08522033690997 2015 -17.64829063416005 2016 106.8068141937299