Year	sq. km
1990	255458.6
1991	252904.39
1992	250350.18
1993	247795.97
1994	245241.76
1995	242687.55
1996	240133.34
1997	237579.13
1998	235024.92
1999	232470.71
2000	229916.5
2001	226495.06
2002	223073.62
2003	219652.18
2004	216230.74
2005	212809.3
2006	209387.86
2007	205966.42
2008	202544.98
2009	199123.54
2010	195702.1
2011	191559.56
2012	187417.02
2013	183274.48
2014	179131.94
2015	174989.4
2016	173331.3
2017	169402.7
2018	166609.3
2019	163816
2020	161022.6
2021	158229.267