Year	thousand metric tons of CO2 equivalent
1990	20.5
1991	20.5
1992	20.5
1993	20.5
1994	20.5
1995	20.5
1996	20.5
1997	41
1998	61.5
1999	82
2000	102.5
2001	113.046277
2002	123.592555
2003	134.138832
2004	144.685109
2005	155.231387
2006	163.09381
2007	170.956234
2008	178.818657
2009	186.68108
2010	194.543504
2011	200.668249
2012	206.792994
2013	212.917739
2014	219.042484
2015	225.16723
2016	231.450966
2017	237.734703
2018	244.018439
2019	250.302176
2020	256.585913