Year	thousand metric tons of CO2 equivalent
1990	4350
1991	4477.1
1992	4715.9
1993	5455.4
1994	6158.8
1995	6166.6
1996	6497
1997	6442.8
1998	6140.9
1999	6157.8
2000	6530.2
2001	7221.7
2002	6696.4
2003	7218.4
2004	8867.1
2005	8765.8
2006	8838
2007	8255.1
2008	8357.6
2009	7803.7
2010	8020.8
2011	8279.1
2012	8059.9
2013	8346.5
2014	8877.9
2015	8527.7
2016	8647.4
2017	8243
2018	7957.9
2019	8198.4
2020	6886