Year	Square Kilometers
1990	161
1991	173.7
1992	186.4
1993	199.1
1994	211.8
1995	224.5
1996	237.2
1997	249.9
1998	262.6
1999	275.3
2000	288
2001	303.4
2002	318.8
2003	334.2
2004	349.6
2005	365
2006	377.4
2007	389.8
2008	402.2
2009	414.6
2010	427
2011	440
2012	453
2013	466
2014	479
2015	492