Year	thousand metric tons of CO2 equivalent
1990	4818.3575
1991	4622.9425
1992	4653.1625
1993	4790.0375
1994	5027.695
1995	4888.365
1996	4875.0625
1997	4935.8325
1998	4850.73
1999	4735.2575
2000	4785.13
2001	4729.5575
2002	4712.605
2003	4725.4575
2004	4828.3525
2005	4787.0375
2006	4636.405
2007	4853.985
2008	4794.91
2009	4872.62
2010	4874.6775
2011	4808.7
2012	4776.82
2013	4767.4875
2014	4532.465
2015	4776.71
2016	4734.975
2017	4695.12
2018	4717.1225
2019	4567.835
2020	4440.31