Year	thousand metric tons of CO2 equivalent
1970	-638.493493176532
1971	-634.695243350482
1972	-481.194868536842
1973	-639.0180735494611
1974	-663.67204624877
1975	-651.2422658038079
1976	-567.711670560169
1977	-273.40921115951505
1978	-604.09205763669
1979	-427.2480053294181
1980	-546.958402108574
1981	-501.55526631546013
1982	-515.1145686027531
1983	-646.0731135849
1984	-591.919747887039
1985	-567.224394903183
1986	-506.167288087845
1987	-453.28701560401913
1988	-451.4332584304811
1989	-528.6140482997891
1990	-594.17614364624
1991	-558.564017295837
1992	-477.750587463379
1993	-440.07280731201195
1994	-635.780778884888
1995	-502.585098266602
1996	-478.031393051147
1997	-482.41039657592796
1998	-449.994110107422
1999	-466.708608627319
2000	-232.450996398926
2001	-261.831104278564
2002	-155.217792510986
2003	-188.37909317016602
2004	-285.02859878540005
2005	-189.118095397949
2006	-266.37658691406295
2007	-322.676902770996
2008	-379.71428298950195
2009	-677.6805915832499
2010	-676.18749237061
2011	-657.8339309692401
2012	-575.1606063842801
2013	-579.9135360717801
2014	-570.58298492432
2015	-594.8529663085901
2016	-422.09963989257994