Year	% of land area
1961	4.068682344158268
1962	4.087346024636059
1963	4.106009705113848
1964	4.124673385591639
1965	4.143337066069429
1966	4.162000746547219
1967	4.180664427025009
1968	4.1993281075028
1969	4.21799178798059
1970	4.245987308697275
1971	4.264650989175065
1972	4.292646509891751
1973	4.320642030608436
1974	4.339305711086226
1975	4.367301231802911
1976	4.385964912280701
1977	4.413960432997388
1978	4.432624113475177
1979	4.451287793952967
1980	4.479283314669653
1981	4.4979469951474425
1982	4.516610675625234
1983	4.525942515864129
1984	4.525942515864129
1985	4.525942515864129
1986	4.525942515864129
1987	4.525942515864129
1988	4.525942515864129
1989	4.525942515864129
1990	4.525942515864129
1991	4.525942515864129
1992	4.525942515864129
1993	5.188503172825682
1994	5.188503172825682
1995	5.179171332586787
1996	5.123180291153416
1997	5.225830533781261
1998	5.3284807764091076
1999	5.431131019036954
2000	5.5337812616648
2001	5.636431504292647
2002	5.739081746920493
2003	5.8417319895483395
2004	6.532288167226577
2005	7.8480776409107875
2006	7.932064203060843
2007	8.687943262411348
2008	8.799925345278089
2009	8.865248226950355
2010	9.051885031728258
2011	9.33184023889511
2012	9.518477043673013
2013	9.639790966778648
2014	9.901082493467712
2015	11.039567002612916
2016	11.039567002612916
2017	11.039567002612916
2018	11.039567002612916
2019	11.039567002612916
2020	11.039567002612916
2021	11.039567002612916