Year	Square Kilometers
1990	19450
1991	18833
1992	18216
1993	17599
1994	16982
1995	16365
1996	15748
1997	15131
1998	14514
1999	13897
2000	13280
2001	13156
2002	13032
2003	12908
2004	12784
2005	12660
2006	12536
2007	12412
2008	12288
2009	12164
2010	12040
2011	11916
2012	11792
2013	11668
2014	11544
2015	11420