Year	thousand metric tons of CO2 equivalent
1990	6571.5975
1991	6557.2425
1992	6430.2825
1993	6190.93
1994	6088.635
1995	5753.28
1996	5742.81
1997	5646.4675
1998	5511.89
1999	5491.1
2000	5393.44
2001	5351.155
2002	5284.8425
2003	5134.2375
2004	5041.7075
2005	5015.8375
2006	4951.7625
2007	4919.125
2008	4956.1175
2009	4911.935
2010	4978.54
2011	4959.99
2012	4870.9175
2013	4830.31
2014	4834.0625
2015	4837.4825
2016	4830.2675
2017	4830.84
2018	4754.8825
2019	4686.0875
2020	4653.67