Year	% of land area
2006	12.936802973977695
2007	12.936802973977695
2008	12.862453531598513
2009	12.862453531598513
2010	12.788104089219331
2011	12.862453531598513
2012	12.788104089219331
2013	0.5799256505576209
2014	0.6490706319702602
2015	0.6468401486988847
2016	0.6691449814126395
2017	0.6840148698884758
2018	0.6840148698884758
2019	0.6691449814126395
2020	0.6765799256505577
2021	0.6617100371747212