Year	% of land area
1992	42.96875
1993	42.7734375
1994	42.578125
1995	42.48046875
1996	42.3828125
1997	42.28515625
1998	42.1875
1999	41.11328125
2000	41.6015625
2001	41.5234375
2002	41.46484375
2003	42.36328125
2004	42.37109375
2005	42.12890625
2006	42.16796875
2007	41.97265625
2008	41.6015625
2009	41.5625
2010	41.875
2011	42.01171875
2012	42.109375
2013	42.20703125
2014	42.12890625
2015	42.5
2016	43.14453125
2017	43.515625
2018	43.18359375
2019	43.28125
2020	43.7890625
2021	44.19921875