Year	thousand metric tons of CO2 equivalent
1990	3355.5694
1991	3477.064
1992	3628.6566
1993	3759.4786
1994	3866.7586
1995	3933.5404
1996	4164.3116
1997	4518.7826
1998	4323.384
1999	3992.2762
2000	3725.5364
2001	4936.072
2002	4407.6584
2003	4307.1132
2004	4482.1584
2005	4234.4012
2006	4311.315
2007	4020.8246
2008	4393.5332
2009	4613.2486
2010	4834.4242
2011	4881.7168
2012	4722.9424
2013	4665.339
2014	4565.0322
2015	4064.3028
2016	4311.4342
2017	4321.2384
2018	4388.2586
2019	4444.4614
2020	4432.3328