Year	thousand metric tons of CO2 equivalent
1970	7408.450781249943
1971	9512.31640625
1972	10628.717187499948
1973	10895.203125
1974	10843.15234375
1975	10541.226562499985
1976	11623.64843750003
1977	12363.117187499956
1978	13616.582031249956
1979	14515.063593749946
1980	14775.249999999985
1981	14858.444218750054
1982	14687.14062500003
1983	17923.72375000002
1984	17971.496093749985
1985	17229.57703124998
1986	18142.011718750015
1987	26940.846796875005
1988	16955.037109375044
1989	16812.024296874995
1990	-12539.65234375
1991	-11528.2578125
1992	-12066.97265625
1993	-11919.623046875
1994	-12676.236328125
1995	-13896.044921875
1996	-11557.02734375
1997	-11108.291015625
1998	-14621.322265625
1999	-12936.619140625
2000	-9701.064453125
2001	-11803.1015625
2002	-10430.126953125
2003	-9998.341796875
2004	-8451.986328125
2005	-8625.306640625
2006	-7158.7421875
2007	-8568.248046875
2008	-10359.908203125
2009	-6218.4140625
2010	-11280.880859375
2011	4834.779296875
2012	9504.890625
2013	3588.52734375
2014	3266.501953125
2015	5498.5390625
2016	996.68359375