Year	thousand metric tons of CO2 equivalent
1990	563.3
1991	549.2
1992	475.5
1993	467.6
1994	447.9
1995	191.7
1996	247
1997	256.3
1998	305.2
1999	309.5
2000	306.3
2001	314.3
2002	308.9
2003	282.1
2004	287.4
2005	285.9
2006	307.4
2007	306.3
2008	299.3
2009	281.4
2010	290.2
2011	285
2012	255.6
2013	241.3
2014	224.1
2015	209.8
2016	216.9
2017	226.7
2018	332.4
2019	342.9
2020	388