Year	thousand metric tons of CO2 equivalent
1970	-128.2959685965543
1971	-118.84273182420702
1972	-132.09657467317618
1973	-123.31014654922478
1974	-123.89027401637986
1975	-138.850311108112
1976	-111.94359904289172
1977	-119.87337080192628
1978	-116.933865879059
1979	-143.22327421569764
1980	-142.7354464187623
1981	-124.87580665206906
1982	-152.05241317176797
1983	-123.97747456741263
1984	-94.170824653625
1985	-100.50987397384608
1986	-92.10690575790409
1987	-159.18231252670273
1988	-106.350315635681
1989	-104.81136429595904
1990	-233.0785355567932
1991	-263.38096141815186
1992	-292.519775390625
1993	-315.4064736366272
1994	-400.85691833496094
1995	-425.445556640625
1996	-409.546023368835
1997	-486.07934093475296
1998	-388.8739666938782
1999	-334.200878143311
2000	-265.81594991684005
2001	-391.2207851409912
2002	-386.24743890762284
2003	-514.4046516418462
2004	-527.1920289993291
2005	-508.29732561111496
2006	-472.09663438796997
2007	-520.2242798805241
2008	-559.8150053024292
2009	-490.8712844848633
2010	-446.864922523499
2011	-407.8543434143071
2012	-388.11262893676985
2013	-350.0115203857399
2014	-377.40060424805006
2015	-343.74169540405
2016	-293.61785507201967