Year	thousand metric tons of CO2 equivalent
1990	0.00999999
1991	0.076
1992	0.142
1993	0.208
1994	0.274
1995	0.34
1996	0.322
1997	0.304
1998	0.286
1999	0.268
2000	0.25
2001	0.285279
2002	0.320558
2003	0.355837
2004	0.391116
2005	0.426395
2006	0.401723
2007	0.37705
2008	0.352378
2009	0.327706
2010	0.303033
2011	0.327591
2012	0.352149
2013	0.376706
2014	0.401264
2015	0.425822
2016	0.428371
2017	0.43092
2018	0.43347
2019	0.436019
2020	0.438568