Year	thousand metric tons of CO2 equivalent
1990	353.1
1991	338.6
1992	366.2
1993	357.9
1994	354.3
1995	352.2
1996	352.1
1997	350.8
1998	357.2
1999	399.3
2000	371.3
2001	373.3
2002	369.9
2003	359.9
2004	358.8
2005	368.8
2006	377.4
2007	378.6
2008	370.6
2009	375.8
2010	392.6
2011	424
2012	435.9
2013	450.7
2014	453.4
2015	460.6
2016	453.2
2017	455
2018	480.8
2019	476.8
2020	464.4