Year	thousand metric tons of CO2 equivalent
1970	20251.479921874987
1971	18720.160546875006
1972	12036.911796875007
1973	11788.44312499998
1974	9676.354296875015
1975	9482.560781250006
1976	8568.228593749998
1977	8524.653359374985
1978	6808.431093750023
1979	9571.252617187009
1980	8715.925117187006
1981	2512.9712109370084
1982	2967.409414062029
1983	3059.8995312500047
1990	-18872.690429688024
1991	-18030.548828125
1992	-23268.650390625
1993	-17266.962890625
1994	-17665.48046875
1995	-17978.4765625
1996	-19043.400390625
1997	-20767.970703125
1998	-18813.529296875
1999	-18333.169921875
2000	-18330.791992188024
2001	31973.59765625
2002	28985.537109375
2003	22627.890625
2004	26422.919921875
2005	12827.1171875
2006	9400.9296875
2007	7556.5625
2008	13354.0390625
2009	15479.11328125
2010	31794.2890625
2011	33844.240234375
2012	54698.271484375
2013	50625.9765625
2014	52918.142578125
2015	45882.779296875
2016	49022.15625