Year	Square Kilometers
1990	57610
1991	56910
1992	56210
1993	55510
1994	54810
1995	54110
1996	53410
1997	52710
1998	52010
1999	51310
2000	50610
2001	50110
2002	49610
2003	49110
2004	48610
2005	48110
2006	47610
2007	47110
2008	46610
2009	46110
2010	45610
2011	45110
2012	44610
2013	44110
2014	43610
2015	43110