Year	thousand metric tons of CO2 equivalent
1970	4821.824749999985
1971	3640.139468750018
1972	4502.372337499975
1973	5826.951718749995
1974	4778.186812500007
1975	4034.477187500008
1976	5265.656212500027
1977	6331.765656250005
1978	7017.530374999995
1979	7331.5741250000065
1980	7319.869468750025
1981	7817.1039375
1982	7551.796531249995
1983	9274.839218750014
1984	9920.19284375001
1985	11343.508249999988
1986	12212.15521875001
1987	-3440.1069375000225
1988	17460.70515625
1989	18914.047968749976
1990	-15197.3203125
1991	-15336.6953125
1992	-15495.2578125
1993	-14445.041015625
1994	-13111.23828125
1995	-13458.4375
1996	-13100.56640625
1997	-12834.560546875
1998	-12664.373046875
1999	-12590.814453125
2000	-13128.013671875
2001	-11249.3125
2002	-11625.1875
2003	-10651.94921875
2004	-10238.703125
2005	-8813.109375
2006	-10065.13671875
2007	-8604.89453125
2008	-7264.05859375
2009	-2636.166015625
2010	-2764.693359375
2011	-117.248046875
2012	-2696.89453125
2013	674.701171875
2014	292.171875
2015	-2083.400390625
2016	-9429.5546875