Year	thousand metric tons of CO2 equivalent
1990	19712.8
1991	18018.3
1992	16518.8
1993	15896
1994	14403.6
1995	14030.4
1996	14264.7
1997	13330.9
1998	12402.5
1999	12855.5
2000	12496.3
2001	12555.3
2002	12631.5
2003	12353.3
2004	12691.4
2005	12962.2
2006	12148.3
2007	12266.4
2008	11967.8
2009	10450.7
2010	11637.7
2011	10783.6
2012	10404.2
2013	10288.1
2014	9177.6
2015	8225.7
2016	8361.2
2017	8262.1
2018	8737.5
2019	8463
2020	8086.1