Year	thousand metric tons of CO2 equivalent
1990	3538.3924
1991	3668.7674
1992	3844.349
1993	3984.707
1994	4113.2642
1995	4317.1558
1996	4507.846
1997	4614.3214
1998	4905.974
1999	5118.8652
2000	5321.4158
2001	5607.6448
2002	5827.539
2003	6061.8862
2004	6268.2214
2005	6604.6932
2006	6877.5122
2007	7197.3854
2008	7573.1932
2009	7835.5822
2010	7770.6778
2011	7974.927
2012	8504.771
2013	8859.689
2014	9352.7598
2015	9692.8672
2016	10225.6614
2017	10689.1408
2018	11219.5212
2019	11698.1688
2020	12281.5932