Year	thousand metric tons of CO2 equivalent
1970	23.789243669545584
1971	23.74840092015269
1972	24.216203060782007
1973	25.340522528719916
1974	32.597247697257984
1975	24.588576083624417
1976	20.32571226434706
1977	12.303568436348357
1978	-21.967160928416277
1979	-6.081904887795389
1980	46.806619695663514
1981	31.853527551651
1982	34.14643382019999
1983	29.718516666257372
1984	11.085431884598705
1985	42.90700006425381
1986	42.90431737452751
1987	36.33695653122659
1988	58.88751798540349
1989	53.2680036860108
1990	-3.5034304559230804
1991	14.101483151316586
1992	20.2334655970335
1993	20.213698625564575
1994	19.063105762004852
1995	26.404332473874092
1996	34.26182407140732
1997	47.99897854030132
1998	46.201447904109955
1999	44.1502261608839
2000	28.276657283306122
2001	26.271797597408295
2002	32.950597897171974
2003	30.427764177322388
2004	-4.162235304713249
2005	14.36410440504551
2006	6.147538796067238
2007	51.26818761229515
2008	42.57322983443737
2009	53.75071619451046
2010	39.542010232806206
2011	31.288644641637802
2012	16.12379729747795
2013	-3.3038292974230217
2014	39.86381229758297
2015	11.515996314584982
2016	52.29438243806396