Year	thousand metric tons of CO2 equivalent
1990	0.9536
1991	1.0728
1992	1.1026
1993	1.043
1994	1.0728
1995	1.0728
1996	1.1026
1997	1.1324
1998	1.1324
1999	1.1622
2000	1.1622
2001	1.1622
2002	1.192
2003	1.192
2004	1.192
2005	1.192
2006	1.192
2007	1.192
2008	1.2218
2009	1.2516
2010	1.2218
2011	1.2516
2012	1.2516
2013	1.2516
2014	1.2516
2015	1.2814
2016	1.2814
2017	1.2814
2018	1.2814
2019	1.3112
2020	1.3112