Year	thousand metric tons of CO2 equivalent
1990	1622.3
1991	1679.4
1992	1751.4
1993	1890.6
1994	2441.8
1995	2491.9
1996	2537.4
1997	2585
1998	2733.2
1999	2891.4
2000	3064.9
2001	3161.1
2002	3311.2
2003	3461.9
2004	3523.3
2005	3786.3
2006	3932
2007	3946.4
2008	4022.2
2009	4191.2
2010	4308.3
2011	4474.2
2012	4393.6
2013	4574.4
2014	4453
2015	4555
2016	4623.6
2017	4656.5
2018	4717.7
2019	5039.3
2020	5092.4