Year	thousand metric tons of CO2 equivalent
1990	4689.849403
1991	4685.095468
1992	4882.803534
1993	5095.0914
1994	5394.9784
1995	5696.287867
1996	5977.244533
1997	6188.1254
1998	6265.252067
1999	6520.893933
2000	6616.743
2001	6556.4966
2002	6621.089
2003	6368.6856
2004	6909.2322
2005	6595.034
2006	6802.5044
2007	7314.902
2008	8080.8348
2009	8000.013
2010	8246.9364
2011	7697.072105
2012	7714.301209
2013	7246.732514
2014	6840.471018
2015	6880.639323
2016	6536.346819
2017	6267.242115
2018	6239.93341
2019	6599.049106
2020	6599.431802