Year	thousand metric tons of CO2 equivalent
1970	36878.374862415745
1971	36390.89723110119
1972	38364.30675220575
1973	38914.06544472923
1974	42710.61438120116
1975	45208.72798700502
1976	43041.031062700145
1977	45914.19811969093
1978	43695.39593276634
1979	52580.32805511668
1980	52434.384163737675
1981	52465.5092797288
1982	62367.152514621856
1983	62350.09991129725
1984	60361.28239420959
1985	51683.869559940234
1986	45139.489288777164
1987	18469.178168753802
1988	38881.213928778576
1989	30956.958228644027
1990	-42838.77227216071
1991	-32762.39448218109
1992	-34882.64937897906
1993	-38660.03018434065
1994	-49227.58258863178
1995	-48991.91077474965
1996	-51699.54506289443
1997	-62843.54054893979
1998	-55049.5514176963
1999	-51896.50194876199
2000	-65823.04524251213
2001	-56460.79201984471
2002	-63639.20121861703
2003	-72502.37828397748
2004	-40192.50782280026
2005	-23200.431137609194
2006	6035.374820494137
2007	-3609.6160715575425
2008	14510.520048546914
2009	-3472.724029636338
2010	-1063.7891430829986
2011	8171.510303591676
2012	50815.11425632881
2013	67955.15002250564
2014	91711.18681907674
2015	74062.40546226435
2016	56339.75653266917