Year	Square Kilometers
1990	11880
1991	11880
1992	11970
1993	12015
1994	12060
1995	12105
1996	12150
1997	12195
1998	12240
1999	12285
2000	12330
2001	12350
2002	12370
2003	12390
2004	12410
2005	12430
2006	12438
2007	12446
2008	12454
2009	12462
2010	12470
2011	12472
2012	12474
2013	12476
2014	12478
2015	12480