Year	thousand metric tons of CO2 equivalent
1990	3255.6
1991	3258.3
1992	3261.5
1993	4171.8
1994	5162
1995	5216.9
1996	5643.4
1997	5780.6
1998	5608.2
1999	5401.7
2000	5300.2
2001	5567.6
2002	5626.5
2003	6120.2
2004	5998.8
2005	5980.4
2006	6034.6
2007	6362.7
2008	6400
2009	6323.7
2010	6350.2
2011	6431.3
2012	5168.7
2013	5519.6
2014	6250.2
2015	6399.8
2016	6524.5
2017	7344
2018	6467.1
2019	6560.3
2020	6604.5