Year	thousand metric tons of CO2 equivalent
1990	3719.1
1991	4170.1
1992	4328.4
1993	4508.8
1994	4921.6
1995	4990.4
1996	5581.2
1997	6284.9
1998	6595.3
1999	7111.5
2000	7809.4
2001	8133.1
2002	8673.3
2003	9318.4
2004	9748.1
2005	10504.8
2006	10877.7
2007	11585.5
2008	12606.4
2009	12281.6
2010	13594.3
2011	13084.4
2012	14763.7
2013	15425
2014	15630.6
2015	15117.1
2016	14591.5
2017	13995.7
2018	13995.9
2019	14270
2020	12906.2