Year	Square Kilometers
1990	47480
1991	46940
1992	46400
1993	45860
1994	45320
1995	44780
1996	44240
1997	43700
1998	43160
1999	42620
2000	42080
2001	41540
2002	41000
2003	40460
2004	39920
2005	39380
2006	38948
2007	38516
2008	38084
2009	37652
2010	37220
2011	36856
2012	36492
2013	36128
2014	35764
2015	35400