Year	thousand metric tons of CO2 equivalent
1990	4375.385
1991	4183.7412
1992	4051.161
1993	3934.643
1994	4078.9942
1995	4384.2654
1996	5301.9862
1997	5005.1484
1998	4481.5326
1999	4360.485
2000	4167.1426
2001	5253.0844
2002	5441.3906
2003	1783.6194
2004	2058.7628
2005	2602.3744
2006	3640.815
2007	2603.0598
2008	7087.0658
2009	2461.5992
2010	8285.8304
2011	10528.9658
2012	4232.7026
2013	3721.424
2014	2337.065
2015	1976.187
2016	1596.5648
2017	3256.5738
2018	2150.0104
2019	1206.1252
2020	2845.5722