Year	thousand metric tons of CO2 equivalent
1970	-1521.469716796897
1971	-1291.338541406304
1972	-1243.155916796898
1973	-1482.2111070313076
1974	-1478.8498027343949
1975	-498.43160742189593
1976	60.43479257810395
1977	489.0802007812026
1978	747.0944345312055
1979	813.9399853124933
1980	876.6778021094042
1981	830.858094765601
1982	852.1470115624988
1983	877.6244774999959
1984	942.2223477343978
1985	979.8745064061968
1986	1059.216538046895
1987	-3484.421637734402
1988	1171.3603578906086
1989	1181.3978345312007
1990	-1615.383300781301
1991	-1669.4157714843968
1992	-1719.1298828125
1993	-1842.189941406301
1994	-3610.253417968801
1995	-4404.531005859397
1996	-4142.786621093794
1997	-3967.425048828103
1998	-3232.781982421897
1999	-3180.858642578103
2000	-3619.611328125
2001	-3178.993652343801
2002	-3122.9213867187937
2003	-3021.7563476562937
2004	-3161.0869140625
2005	-2747.0576171875
2006	-3005.991455078096
2007	-2325.4916992187937
2008	-2353.132080078103
2009	-2384.217529296897
2010	-2369.96484375
2011	-2019.1044921875
2012	-6284.268066406301
2013	-6098.460205078103
2014	-5575.638671875
2015	-5125.297607421897
2016	-4043.958740234397