Year	thousand metric tons of CO2 equivalent
1970	-1924.673730468798
1971	-3543.9267968750014
1972	-3594.1062304687975
1973	-3429.112226562499
1974	-3380.607773437502
1975	-3390.960351562502
1976	-3456.051015625004
1977	-3691.9764453125026
1978	-263.7247265624992
1979	-247.21363281250433
1980	2783.199707031198
1981	3539.155917968699
1982	3077.4697460936986
1983	2823.3233203125055
1984	3492.575771484393
1985	3193.8144531249936
1986	2624.981699218696
1987	828.8954296874954
1988	2717.2241992187064
1989	1480.7378320312046
1990	-5477.783447265603
1991	-4288.471923828103
1992	-2736.056640625
1993	-3133.708740234397
1994	-3432.910888671897
1995	-3270.289550781301
1996	-3688.402832031301
1997	-3664.575683593801
1998	-3485.484375
1999	-3857.099609375
2000	-4685.5849609375
2001	-3909.517578125
2002	-3980.22265625
2003	-3903.619140625
2004	-4536.041015625
2005	-4012.322753906301
2006	-4545.474609375
2007	-4039.328613281301
2008	-4162.8388671875
2009	-3391.203613281301
2010	-4911.551269531301
2011	-3855.648925781301
2012	-4801.2060546875
2013	-4688.3349609375
2014	-4816.268066406301
2015	-4667.978515625
2016	-4627.241699218801