Year	Square Kilometers
1990	2.2
1991	2.3
1992	2.5
1993	2.6
1994	2.8
1995	2.9
1996	3.1
1997	3.2
1998	3.4
1999	3.6
2000	3.7
2001	3.9
2002	4
2003	4.2
2004	4.3
2005	4.5
2006	4.6
2007	4.8
2008	4.9
2009	5.1
2010	5.3
2011	5.4
2012	5.6
2013	5.7
2014	5.9
2015	6