Year	thousand metric tons of CO2 equivalent
1970	8.703831604004009
1971	8.656871826171944
1972	10.723504745483005
1973	9.98978572082492
1974	10.054184265136897
1975	9.752434448242013
1976	7.929698516846052
1977	12.003826156615979
1978	11.582663177489906
1979	10.037868087768935
1980	16.583747711180067
1981	16.046307449340013
1982	13.462949371339981
1983	11.510602256774924
1984	15.388536834719915
1985	6.090778732300144
1986	19.859144744870093
1987	-69.37157516478987
1988	22.239013175959585
1989	19.899479599000102
1990	-11.156930446620208
1991	2.6471590995802217
1992	-5.2214484214800905
1993	-2.546329975129993
1994	-3.8098168373098815
1995	-4.933496952060068
1996	-0.18553924561001622
1997	-5.816029548650022
1998	-12.566666603090198
1999	-6.232311248780206
2000	6.4229211807301
2001	16.427118778230124
2002	17.130906581880026
2003	17.730943679810025
2004	24.587343692779996
2005	-72.9083189964299
2006	126.63874530792009
2007	54.234288215639936
2008	231.64388465880984
2009	154.29239940642992
2010	254.33656358719008
2011	250.78179645538012
2012	471.7981557846101
2013	439.2679872512799
2014	467.1803627014201
2015	-291.9286537170401
2016	-657.8694896697998