Year	sq. km
1990	26991.5
1991	26907.93
1992	26824.36
1993	26740.79
1994	26657.22
1995	26573.65
1996	26490.08
1997	26406.51
1998	26322.94
1999	26239.37
2000	26155.8
2001	26072.23
2002	25988.66
2003	25905.09
2004	25821.52
2005	25737.95
2006	25654.38
2007	25570.81
2008	25487.24
2009	25403.67
2010	25320.1
2011	25236.52
2012	25152.94
2013	25069.36
2014	24985.78
2015	24902.2
2016	24818.6
2017	24735
2018	24651.4
2019	24567.8
2020	24484.2
2021	24400.6