Year	thousand metric tons of CO2 equivalent
1970	12284.488726561991
1971	9389.21587499998
1972	20480.07334375001
1973	10112.631906250019
1974	13474.21851562499
1975	18236.842867186984
1976	28145.40549218704
1977	28655.865460937013
1978	18386.20462500002
1979	29319.410945312004
1980	33960.19846875002
1981	17566.61196875001
1982	29812.332625000003
1983	18980.262062500027
1984	21024.221617186973
1985	36588.764078124965
1986	27892.564414061984
1987	9421.270890625012
1988	20981.740757811996
1989	23024.18549999997
1990	-6368.110351563024
1991	-7277.887695313024
1992	-7024.25
1993	-7833.637695313024
1994	-9208.109375
1995	-9568.018554688024
1996	-8971.48828125
1997	-11488.48046875
1998	-10248.73828125
1999	-14568.708984375
2000	-14652.552734375
2001	-19953.369140625
2002	-22264.91015625
2003	-31996.65625
2004	-33870.814453125
2005	-33892.5390625
2006	-25249.10546875
2007	-34203.037109375
2008	-32988.638671875
2009	-31081.380859375
2010	-21765.140625
2011	-30485.052734375
2012	-20663.681640625
2013	-22742.505859375
2014	-22586.552734375
2015	-29898.16015625
2016	-17268.705078125