Year	Square Kilometers
1990	559200
1991	555200
1992	551200
1993	547200
1994	543200
1995	539200
1996	535200
1997	531200
1998	527200
1999	523200
2000	519200
2001	515200
2002	511200
2003	507200
2004	503200
2005	499200
2006	495200
2007	491200
2008	487200
2009	483200
2010	479200
2011	475480
2012	471760
2013	468040
2014	464320
2015	460600