Year	Square Kilometers
1990	172340
1991	168243
1992	164146
1993	160049
1994	155952
1995	151855
1996	147758
1997	143661
1998	139564
1999	135467
2000	131370
2001	127274
2002	123178
2003	119082
2004	114986
2005	110890
2006	106794
2007	102698
2008	98602
2009	94506
2010	90410
2011	86314
2012	82218
2013	78122
2014	74026
2015	69930