Year	thousand metric tons of CO2 equivalent
1970	562004.3941198197
1971	579614.1162441989
1972	640189.4434659412
1973	603950.712959057
1974	589759.1883915033
1975	548245.6859541604
1976	568296.424505229
1977	570762.3444155981
1978	435932.15219741565
1979	437283.00640140544
1980	375394.5965590091
1981	423376.3300624207
1982	381664.28434146766
1983	334849.38653007057
1984	328174.175729231
1985	309330.70704251213
1986	308401.2934407314
1987	205382.25988974562
1988	285116.22692454956
1989	288778.4025725649
1990	-460505.5110986257
1991	-405006.16335082287
1992	-323100.7986962802
1993	-275548.8329877864
1994	-275804.31262493227
1995	-315946.604869844
1996	-280804.87105751154
1997	-268462.62784004305
1998	-285011.8413066877
1999	-299065.53653335676
2000	-308930.5679144868
2001	-308593.0242400182
2002	-296572.4543175705
2003	-328659.2873635306
2004	-333788.4944176703
2005	-317772.0558953303
2006	-294181.7478890441
2007	-306249.972486499
2008	-267418.5735480804
2009	-225190.53964948808
2010	-223862.20689153788
2011	-210493.15818572178
2012	-189009.90159463964
2013	-196022.85577297234
2014	-166266.84903359454
2015	-184062.90319132822
2016	-180130.36817836761