Year	thousand metric tons of CO2 equivalent
1970	44324.92373046868
1971	44291.552832031186
1972	44225.893652343686
1973	43600.03662109371
1974	43156.15976562501
1975	45932.108007812494
1976	47174.06093749999
1977	48211.74023437501
1978	49368.19384765621
1979	50259.50439453119
1980	51859.669726562
1981	50049.37624999999
1982	47988.15064453101
1983	45960.65429687501
1984	44214.859355468994
1985	42184.457246093996
1986	39855.59390625001
1987	39524.636328125016
1988	45766.17656250001
1989	46961.420156249995
1990	-8312.702148437995
1991	-8077.603515625
1992	-6367.70703125
1993	-5094.609863281294
1994	-4780.127441406294
1995	-4655.828125
1996	-4562.03125
1997	-4344.191894531301
1998	-4509.572753906301
1999	-4615.984863281301
2000	-4817.660644531301
2001	-4766.015625
2002	-4887.229980468801
2003	-4690.112792968801
2004	-6658.609863281301
2005	-6955.2158203125
2006	-9131.778808593794
2007	-7231.152832031301
2008	-7099.310546875
2009	-7827.1015625
2010	-8944.12109375
2011	-7542.0400390625
2012	-7006.10546875
2013	-7266.849609375
2014	-7290.169433593794
2015	-4759.1328125
2016	-7365.6689453125