Year	Square Kilometers
1990	11050
1991	11431
1992	11812
1993	12193
1994	12574
1995	12955
1996	13336
1997	13717
1998	14098
1999	14479
2000	14860
2001	15192
2002	15524
2003	15856
2004	16188
2005	16520
2006	16850
2007	17180
2008	17510
2009	17840
2010	18170
2011	18502
2012	18834
2013	19166
2014	19498
2015	19830