Year	sq. km
1990	6285804.768999998
1991	6268661.0260000015
1992	6385948.5479999995
1993	6368863.572999998
1994	6351778.598000001
1995	6334693.624999999
1996	6317608.652
1997	6300523.677
1998	6283438.702000001
1999	6266353.728
2000	6249268.754000002
2001	6230502.246
2002	6211735.738000001
2003	6192969.230000001
2004	6174202.722000001
2005	6155436.214000001
2006	6136669.705999999
2007	6117903.198
2008	6099136.690000001
2009	6080370.180999999
2010	6061603.6729999995
2011	6039786.900000001
2012	6017970.127000001
2013	5996153.354
2014	5974336.581999999
2015	5952519.809
2016	5932909.578999998
2017	5910918.102
2018	5889089.000000001
2019	5867388.500000001
2020	5845810.999999999
2021	5824151.498999999