Year	kt of CO2 equivalent
1990	3.448874
1991	3.550405
1992	3.649437
1993	3.748468
1994	3.81
1995	3.871532
1996	3.906349
1997	3.941167
1998	3.975985
1999	4.010803
2000	4.045621
2001	4.05765
2002	4.06968
2003	4.08171
2004	4.09374
2005	4.10577
2006	4.113072
2007	4.157874
2008	4.202677
2009	4.209979
2010	4.217281
2011	4.223336
2012	4.229391
2013	4.235447
2014	4.241502
2015	4.247558
2016	4.252825
2017	4.270592
2018	4.275859
2019	4.283626
2020	4.291393