Year	thousand metric tons of CO2 equivalent
1990	434.4
1991	427.4
1992	433.6
1993	439.4
1994	469.8
1995	486.3
1996	483.2
1997	484.7
1998	503.5
1999	505.4
2000	521.5
2001	519.5
2002	537.1
2003	559.1
2004	577.5
2005	595.2
2006	589.8
2007	601.2
2008	583.7
2009	587.6
2010	593.7
2011	598.5
2012	641.7
2013	670.9
2014	700.5
2015	721.8
2016	721.1
2017	807.7
2018	815.8
2019	829.7
2020	818.5