Year	Square Kilometers
1990	144360
1991	145213
1992	146066
1993	146919
1994	147772
1995	148625
1996	149478
1997	150331
1998	151184
1999	152037
2000	152890
2001	154034
2002	155178
2003	156322
2004	157466
2005	158610
2006	159736
2007	160862
2008	161988
2009	163114
2010	164240
2011	165370
2012	166500
2013	167630
2014	168760
2015	169890