Year	thousand metric tons of CO2 equivalent
1970	142727.45415771427
1971	131099.8396990229
1972	141874.26639111238
1973	146763.59411660134
1974	159032.07707724546
1975	153515.18641533089
1976	153790.5523638668
1977	157317.1015603512
1978	164659.67993564488
1979	160422.1958093744
1980	149781.46835839818
1981	181735.75532080073
1982	167508.67473437474
1983	160486.48122460925
1984	157907.4542021484
1985	147008.8647070307
1986	152573.13791699155
1987	121627.57962890637
1988	139083.0369541015
1989	141571.17634716758
1990	-66522.14013671952
1991	-49812.33557128991
1992	-34338.10836792
1993	-17547.915222167787
1994	-17827.556915283785
1995	-38228.26965332081
1996	-39286.17312622133
1997	-36558.034271241224
1998	-34772.46112060566
1999	-33156.041198730905
2000	-38071.66320800786
2001	-35909.189208985306
2002	-28995.558898925756
2003	-29246.50277709948
2004	-30335.238433838418
2005	-27897.00042724678
2006	-30024.97149658315
2007	-31144.643768311766
2008	-29114.642669677854
2009	-15920.180755615382
2010	-21765.419799804593
2011	-19885.876647949226
2012	-29905.623291016047
2013	-29765.79095459023
2014	-28338.615173340033
2015	-28133.924560546733
2016	-27890.600830077914