Year	thousand metric tons of CO2 equivalent
1990	323.1
1991	343.3
1992	338.6
1993	342.3
1994	317
1995	305.5
1996	297.9
1997	291.6
1998	300
1999	310.2
2000	3135.3
2001	3141.9
2002	3172.3
2003	3183.2
2004	3209.2
2005	3227.1
2006	3243.2
2007	3292.5
2008	3326.1
2009	3378.8
2010	3417.1
2011	3451.4
2012	3533.7
2013	3575.1
2014	3656.9
2015	3721.3
2016	3699.1
2017	3672.8
2018	3690.1
2019	3689.3
2020	3576.8