Year	thousand metric tons of CO2 equivalent
1990	3890.9
1991	4020.1
1992	4075.1
1993	4139
1994	4376.1
1995	4558.7
1996	4836
1997	5121.3
1998	5257
1999	5341.7
2000	5170.1
2001	5319.7
2002	5608.1
2003	5827.8
2004	6160.4
2005	6310.5
2006	6377.4
2007	6879
2008	7436.1
2009	7390.9
2010	8313.6
2011	8482.6
2012	8863.8
2013	9350.9
2014	9733.3
2015	9653.5
2016	9558.7
2017	9826.8
2018	9713.1
2019	9922.5
2020	9869.2