Year	Square Kilometers
1990	528000
1991	526334
1992	524668
1993	523002
1994	521336
1995	519670
1996	518004
1997	516338
1998	514672
1999	513006
2000	511340
2001	509674
2002	508008
2003	506342
2004	504676
2005	503010
2006	501344
2007	499678
2008	498012
2009	496346
2010	494680
2011	493014
2012	491348
2013	489682
2014	488016
2015	486350