Year	thousand metric tons of CO2 equivalent
1990	1048.8
1991	1061.2
1992	1076.3
1993	1113.8
1994	1279.8
1995	1299.9
1996	1431.3
1997	1544.3
1998	1682.2
1999	2038.1
2000	2487.4
2001	3128.9
2002	3379.2
2003	3298.2
2004	4097.3
2005	4329
2006	4888.1
2007	5174.4
2008	4819.3
2009	4917.3
2010	4982.3
2011	8371.5
2012	5334.3
2013	5431.3
2014	5569.8
2015	5493.1
2016	4613.8
2017	4256.6
2018	4295.3
2019	4331.4
2020	4162.2