Year	sq. km
1990	2764.8
1991	2682.26
1992	2599.72
1993	2517.18
1994	2434.64
1995	2352.1
1996	2269.56
1997	2187.02
1998	2104.48
1999	2021.94
2000	1939.4
2001	1939.4
2002	1939.4
2003	1939.4
2004	1939.4
2005	1939.4
2006	1939.4
2007	1939.4
2008	1939.4
2009	1939.4
2010	1939.4
2011	2110.8
2012	2282.2
2013	2453.6
2014	2625
2015	2796.4
2016	2796.4
2017	2796.4
2018	2796.4
2019	2796.4
2020	2796.4
2021	2796.4