Year	thousand metric tons of CO2 equivalent
1970	-13911.5326782227
1971	-13888.939379882802
1972	-15049.068518066399
1973	-15631.057238769505
1974	-16211.341918945298
1975	-13216.269128417996
1976	-14138.432800292996
1977	-14930.469348144505
1978	-15752.465612793
1979	-16386.991149902296
1980	-17059.794616699193
1981	-14747.884057617206
1982	-14913.8979248047
1983	-15447.9811523438
1984	-16318.586914062504
1985	-16279.466162109395
1986	-18170.735693359402
1987	-20652.623486328095
1988	-19615.18726806641
1989	-20384.606738281294
1990	4348.754028320298
1991	15085.799438476599
1992	2851.700805664099
1993	16831.048156738303
1994	14856.245941162098
1995	13928.5554504395
1996	13717.351043701201
1997	14139.6335754395
1998	14081.210113525402
1999	12591.3418579102
2000	12248.1934204102
2001	12351.303466796904
2002	12007.552062988296
2003	5759.091186523401
2004	5834.601074218699
2005	6641.530029296904
2006	3756.862792968699
2007	-89.8840332030959
2008	-842.5943603515989
2009	-248.65478515630093
2010	-53.942321777300094
2011	1115.2620849609011
2012	1882.734252929702
2013	1679.1552734375
2014	1716.497192382798
2015	-1162.831176757798
2016	-514.2347412109011