Year	Square Kilometers
1990	11510
1991	11553
1992	11596
1993	11639
1994	11682
1995	11725
1996	11768
1997	11811
1998	11854
1999	11897
2000	11940
2001	11986
2002	12032
2003	12078
2004	12124
2005	12170
2006	12206
2007	12242
2008	12278
2009	12314
2010	12350
2011	12388
2012	12426
2013	12464
2014	12502
2015	12540