Year	sq. km
1990	352040
1991	350214
1992	348388
1993	346562
1994	344736
1995	342910
1996	341084
1997	339258
1998	337432
1999	335606
2000	333780
2001	330616
2002	327452
2003	324288
2004	321124
2005	317960
2006	314796
2007	311632
2008	308468
2009	305304
2010	302140
2011	299906
2012	297672
2013	295438
2014	293204
2015	290970
2016	290100
2017	288990
2018	287910
2019	286810
2020	285730
2021	284636.667