Year	thousand metric tons of CO2 equivalent
1990	13.265
1991	14.045
1992	13.3075
1993	11.5675
1994	12.67
1995	11.69
1996	12.08
1997	15.865
1998	16.8075
1999	17.3025
2000	17.4275
2001	19.04
2002	18.2425
2003	20.4175
2004	19.1825
2005	19.4625
2006	20.515
2007	22.1175
2008	22.41
2009	23.37
2010	24.34
2011	20.75
2012	22.7325
2013	21.325
2014	19.08
2015	19.85
2016	20.3025
2017	19.2025
2018	18.6225
2019	17.6525
2020	19.255