Year	thousand metric tons of CO2 equivalent
1990	8794.8
1991	1404.8
1992	7864.7
1993	14346.2
1994	15944.2
1995	15987.5
1996	16183.3
1997	16724.3
1998	16270.6
1999	15004.1
2000	16324.2
2001	15906.2
2002	15023.4
2003	17518.5
2004	18770.7
2005	19717.8
2006	20224.9
2007	19482.4
2008	20437.2
2009	18122.6
2010	18624
2011	20441.3
2012	21634.6
2013	22535.7
2014	22244.7
2015	21986.9
2016	23477.3
2017	21822.4
2018	22088.2
2019	21796.8
2020	20085.2