Year	thousand metric tons of CO2 equivalent
1990	248.6
1991	247.6
1992	261.7
1993	258.8
1994	252.7
1995	255.7
1996	291.5
1997	291.6
1998	292.2
1999	310.4
2000	324.5
2001	319.6
2002	324.8
2003	333.7
2004	345.1
2005	363.3
2006	361.7
2007	370.3
2008	354.8
2009	356.4
2010	390.2
2011	378.6
2012	394.9
2013	378.1
2014	399.1
2015	422.1
2016	463.8
2017	450
2018	435.5
2019	451
2020	426.5