Year	thousand metric tons of CO2 equivalent
1990	4568
1991	4652.7
1992	4463.1
1993	6082.6
1994	9574.3
1995	9404.3
1996	9533.7
1997	10010.5
1998	10079.1
1999	10896.9
2000	12404.9
2001	12270.1
2002	12229.1
2003	12561.1
2004	11940.6
2005	12705.4
2006	13033.1
2007	12127.4
2008	10808.8
2009	10977.5
2010	12279.6
2011	10602.2
2012	8784.3
2013	9992.5
2014	8868.3
2015	3263.6
2016	1511.7
2017	2239.8
2018	2853.6
2019	2858.7
2020	2690.8