Year	Square Kilometers
1990	50400
1991	50227
1992	50054
1993	49881
1994	49708
1995	49535
1996	49362
1997	49189
1998	49016
1999	48843
2000	48670
2001	48500
2002	48330
2003	48160
2004	47990
2005	47820
2006	47654
2007	47488
2008	47322
2009	47156
2010	46990
2011	46826
2012	46662
2013	46498
2014	46334
2015	46170