Year	Square Kilometers
1990	7978
1991	8549.9
1992	9121.8
1993	9693.7
1994	10265.6
1995	10837.5
1996	11409.4
1997	11981.3
1998	12553.2
1999	13125.1
2000	13697
2001	14001.2
2002	14305.4
2003	14609.6
2004	14913.8
2005	15218
2006	15637
2007	16056
2008	16475
2009	16894
2010	17313
2011	17540.4
2012	17767.8
2013	17995.2
2014	18222.6
2015	18450