Year	thousand metric tons of CO2 equivalent
1970	422216.69897900376
1971	404836.28290334914
1972	454427.37133437436
1973	390099.2704506836
1974	367680.8402786133
1975	339207.7098208485
1976	344991.95884960855
1977	337218.16699856456
1978	190133.51814970688
1979	177572.99307646372
1980	107986.79196318318
1981	150669.31817593204
1982	112898.618645292
1983	66725.40001616199
1984	44360.81234768528
1985	16354.622421385371
1986	-2062.972686983514
1987	-104009.51485251053
1988	-61428.80076681657
1989	-62347.39297384948
1990	-330169.23001098796
1991	-284213.3724060072
1992	-228206.21536254944
1993	-192872.42814636353
1994	-191650.6592178347
1995	-233128.3070297245
1996	-210329.53508758577
1997	-207136.40176391625
1998	-217318.01325225894
1999	-229031.0636596675
2000	-236281.80795669585
2001	-236902.19297790594
2002	-231157.57904052746
2003	-275535.1626205453
2004	-261186.07742309634
2005	-263409.98352050874
2006	-245126.93405914417
2007	-254392.61807251096
2008	-207643.00722575292
2009	-197666.28201437055
2010	-190590.25542831485
2011	-188644.0961227429
2012	-179712.6412284373
2013	-181457.1003284452
2014	-156313.6225395202
2015	-171231.02099728613
2016	-146537.44687533352