Year	thousand metric tons of CO2 equivalent
1970	-4602.944257812991
1971	-4606.842507812993
1972	-4646.311792969003
1973	-4395.4894398440065
1974	-4002.9184515629913
1975	-4213.774367187987
1976	-4392.947996094012
1977	-4685.842351562991
1978	-1026.8665664059972
1979	-1511.6708437499947
1980	-1030.1620117190105
1981	-982.9164648440128
1982	-605.406777344002
1983	-734.7110351559859
1984	-932.1139257809791
1985	-944.9828906250132
1986	-1117.8057617190188
1987	-1576.7133398440255
1988	-1309.9224414060009
1989	-830.6835351559876
1990	-18533.233886719012
1991	-15869.097167969012
1992	-8058.703125
1993	-6937.266113280988
1994	-6768.350585937995
1995	-6799.097167969012
1996	-6753.767578125
1997	-6220.715820312995
1998	-6399.759765625
1999	-6233.620117187995
2000	-6262.97265625
2001	-6091.504882812995
2002	-4571.760253906003
2003	-4035.6704101560026
2004	-4729.030273437995
2005	-4945.458984375
2006	-5954.510742187995
2007	-4024.9033203129948
2008	-3950.650390625
2009	-2696.12109375
2010	-4053.9848632810026
2011	-5436.545410156003
2012	-7003.050292968997
2013	-6920.254882812995
2014	-5365.490234375
2015	-6305.385253906003
2016	-5775.430175781003