Year	sq. km
1990	5279295.499999999
1991	5257255.463999999
1992	5235215.428
1993	5213175.392
1994	5191135.356000001
1995	5169095.32
1996	5147055.284
1997	5125015.248000001
1998	5102975.211999999
1999	5080935.176
2000	5058895.14
2001	5032664.685999999
2002	5006434.232
2003	4980203.778
2004	4953973.324
2005	4927742.87
2006	4901512.416
2007	4875281.962
2008	4849051.507999999
2009	4822821.054
2010	4796590.600000001
2011	4765400.98
2012	4734211.36
2013	4703021.740000001
2014	4671832.120000001
2015	4640642.499999999
2016	4607876.1
2017	4575901.199999999
2018	4544314.78
2019	4511676.2
2020	4479395.000000001
2021	4446875.546