Year	Square Kilometers
1990	140050
1991	143056
1992	146062
1993	149068
1994	152074
1995	155080
1996	158086
1997	161092
1998	164098
1999	167104
2000	170110
2001	168288
2002	166466
2003	164644
2004	162822
2005	161000
2006	161298
2007	161596
2008	161894
2009	162192
2010	162490
2011	162790
2012	163090
2013	163390
2014	163690
2015	163990