Year	thousand metric tons of CO2 equivalent
1990	375.3
1991	309.9
1992	258.1
1993	250
1994	233.8
1995	260.8
1996	309.1
1997	357.3
1998	336.3
1999	235.8
2000	250.2
2001	271.3
2002	296.1
2003	316.2
2004	357.7
2005	329.5
2006	345.8
2007	304.8
2008	302.8
2009	302.3
2010	301
2011	309.7
2012	283.4
2013	294.4
2014	268.7
2015	294.2
2016	299.9
2017	305.4
2018	300.9
2019	309.5
2020	334.8