Year	thousand metric tons of CO2 equivalent
1970	26347.368095936334
1971	26651.40698768089
1972	27082.534838901578
1973	27542.53484907182
1974	29959.43054553822
1975	31507.129809179132
1976	30021.509522478318
1977	31738.262486512136
1978	30482.74364202523
1979	34198.821391771424
1980	33881.39010886724
1981	31518.39040559878
1982	41574.11223828507
1983	37569.783686329305
1984	36145.9559437855
1985	36140.01880653741
1986	30867.079414814776
1987	10803.382834128694
1988	28801.566621993108
1989	27329.552655295145
1990	-28556.31331534689
1991	-22478.020370528367
1992	-35425.64340144408
1993	-36480.913180232004
1994	-43262.542931706164
1995	-42797.40397152352
1996	-39747.706059903714
1997	-34237.84599766255
1998	-33607.90994030242
1999	-32300.94849646109
2000	-38184.425463497784
2001	-35891.41216993343
2002	-40753.299155533314
2003	-45447.74269628526
2004	-42714.54348802633
2005	-32938.710596323144
2006	-12825.658263803081
2007	-22892.04708218576
2008	-16635.725014090713
2009	-11505.14572381987
2010	-23102.828980207618
2011	-13586.030510306438
2012	-4747.804791391041
2013	10722.375138282663
2014	26590.93974494922
2015	7204.015268325707
2016	-5957.806442260833