Year	thousand metric tons of CO2 equivalent
1990	8325.997492
1991	7130.395562
1992	5315.178195
1993	4607.636333
1994	4651.881791
1995	4421.328639
1996	4507.134287
1997	4226.548999
1998	3652.012262
1999	3402.069329
2000	3794.758122
2001	3999.057483
2002	4416.207542
2003	4525.398803
2004	4422.982158
2005	4038.575357
2006	3308.947855
2007	3671.973382
2008	3888.242253
2009	3867.25484
2010	3800.083119
2011	4441.876354
2012	3534.013634
2013	3858.6043
2014	3933.905001
2015	4104.06579
2016	4323.603333
2017	4295.88871
2018	4253.330888
2019	4368.373865
2020	4328.729643