Year	thousand metric tons of CO2 equivalent
1990	7.5096
1991	7.7778
1992	8.5228
1993	9.3572
1994	10.132
1995	10.2512
1996	10.2214
1997	10.2214
1998	10.30885
1999	10.277101
2000	10.185751
2001	10.253627
2002	10.142704
2003	9.85298
2004	9.950656
2005	10.197332
2006	10.341257
2007	10.723582
2008	10.927107
2009	11.190232
2010	11.036157
2011	10.836926
2012	10.429096
2013	9.991465
2014	9.911435
2015	9.950604
2016	9.757305
2017	9.981205
2018	9.877306
2019	9.922406
2020	9.937707