Year	thousand metric tons of CO2 equivalent
1990	425.3
1991	438
1992	393.3
1993	401.7
1994	388.7
1995	403.6
1996	414.1
1997	433.1
1998	389.5
1999	380.1
2000	376
2001	399.1
2002	377.8
2003	387.9
2004	380
2005	369.5
2006	327.7
2007	336.5
2008	347.4
2009	359.6
2010	364.6
2011	354.8
2012	347.3
2013	309.4
2014	321.5
2015	321.6
2016	451.8
2017	462.2
2018	445.3
2019	435
2020	408.3