Year	Square Kilometers
1990	183.9
1991	183.5
1992	183.2
1993	182.9
1994	182.5
1995	182.2
1996	181.9
1997	181.5
1998	181.2
1999	180.8
2000	180.5
2001	180.2
2002	179.8
2003	179.5
2004	179.1
2005	178.8
2006	178.5
2007	178.1
2008	177.8
2009	177.5
2010	177.1
2011	176.8
2012	176.4
2013	176.1
2014	175.8
2015	175.4