Year	Square Kilometers
1990	8360
1991	8360
1992	8407.8
1993	8429.7
1994	8451.6
1995	8473.5
1996	8495.4
1997	8517.3
1998	8539.2
1999	8561.1
2000	8583
2001	8605
2002	8627
2003	8649
2004	8671
2005	8693
2006	8308.4
2007	7923.8
2008	7539.2
2009	7154.6
2010	6770
2011	6690
2012	6610
2013	6530
2014	6450
2015	6370