Year	thousand metric tons of CO2 equivalent
1990	41.5
1991	41.5
1992	41.5
1993	41.5
1994	41.5
1995	41.5
1996	41.5
1997	41.5
1998	41.5
1999	41.5
2000	41.5
2001	41.5
2002	41.5
2003	41.5
2004	41.5
2005	90.3
2006	91.7
2007	133.5
2008	175.1
2009	219.3
2010	262.4
2011	260.466718
2012	257.433437
2013	251.000155
2014	245.966873
2015	244.333591
2016	241.981556
2017	239.029521
2018	233.077486
2019	229.725451
2020	227.873416