Year	Square Kilometers
1990	38960
1991	38631
1992	38302
1993	37973
1994	37644
1995	37315
1996	36986
1997	36657
1998	36328
1999	35999
2000	35670
2001	35340
2002	35010
2003	34680
2004	34350
2005	34020
2006	33690
2007	33360
2008	33030
2009	32700
2010	32370
2011	32190
2012	32010
2013	31830
2014	31650
2015	31470