Year	sq. km
1992	55910
1993	55910
1994	55910
1995	55910
1996	55980
1997	55980
1998	55910
1999	55910
2000	55912
2001	55912
2002	55912
2003	55964
2004	55964
2005	55964
2006	55964
2007	55964
2008	55964
2009	55964
2010	55964
2011	55964
2012	55964
2013	55964
2014	55964
2015	55964
2016	55964
2017	55964
2018	55964
2019	55964
2020	55960
2021	55960