Year	thousand metric tons of CO2 equivalent
1990	162.3
1991	174.7
1992	183.4
1993	191.8
1994	203.6
1995	217
1996	224.6
1997	233.8
1998	243.7
1999	254.1
2000	265.8
2001	284.6
2002	293.8
2003	295.8
2004	362.7
2005	365.7
2006	365.5
2007	366.4
2008	377.4
2009	376.7
2010	391.4
2011	411.1
2012	414.9
2013	416.7
2014	433.3
2015	455.9
2016	463.5
2017	479.2
2018	494.5
2019	534.3
2020	490.7