Year	thousand metric tons of CO2 equivalent
1970	11977.216367187011
1971	13684.440136719011
1972	14705.70585937499
1973	15831.998046874993
1974	16897.545605469
1975	16272.172753905976
1976	17444.599414062017
1977	17302.474999999995
1978	17204.911718750005
1979	17794.41308593699
1980	17420.11230468702
1981	17573.955078125007
1982	17013.41308593701
1983	17879.29492187499
1984	18491.535156249996
1985	18510.62402343701
1986	19176.058593750007
1987	16098.470703125007
1988	20712.5625
1989	20997.83789062499
1990	710.591796875
1991	-1442.0732421879948
1992	463.150390625
1993	1299.078125
1994	1491.72265625
1995	5706.620117187005
1996	8172.012695312005
1997	9542.81640625
1998	9478.7890625
1999	3730.5849609370052
2000	1293.9853515620052
2001	-1284.203125
2002	-1270.23828125
2003	-2731.8017578129948
2004	-3667.9326171879948
2005	-4092.5703125
2006	-2757.173828125
2007	-3056.3583984379948
2008	-4960.3984375
2009	-3210.3408203129948
2010	-2853.6552734379948
2011	-2912.71484375
2012	-3313.1259765629948
2013	-2419.8125
2014	-2321.472167969012
2015	28.359375
2016	-2379.282714844012