Year	thousand metric tons of CO2 equivalent
1990	588.9
1991	531.6
1992	487.6
1993	450.4
1994	404.6
1995	389.4
1996	346.7
1997	320.8
1998	311.4
1999	320.2
2000	354.3
2001	362.8
2002	349.3
2003	355.5
2004	362.7
2005	374
2006	375.7
2007	320.2
2008	351.8
2009	276.1
2010	260.4
2011	196.3
2012	202.7
2013	156.5
2014	170.8
2015	144.5
2016	157.2
2017	261.2
2018	245.6
2019	268.6
2020	255.7