Year	thousand metric tons of CO2 equivalent
1990	12.9075
1991	12.1425
1992	12.3
1993	12.48
1994	12.565
1995	12.6525
1996	12.655
1997	12.6675
1998	12.695
1999	12.6725
2000	12.36
2001	12.0775
2002	11.6525
2003	10.8475
2004	10.8475
2005	10.89
2006	10.9475
2007	11.21
2008	11.235
2009	11.5025
2010	11.3075
2011	11.275
2012	10.6225
2013	9.33
2014	8.755
2015	8.5
2016	8.13
2017	8.63
2018	8.475
2019	8.3875
2020	8.475