Year	% of land area
1961	1.0367298578199051
1962	1.066350710900474
1963	1.15521327014218
1964	1.1848341232227488
1965	1.1848341232227488
1966	1.4514218009478674
1967	1.4514218009478674
1968	1.4514218009478674
1969	1.3625592417061612
1970	1.2736966824644549
1971	1.1848341232227488
1972	1.15521327014218
1973	1.1255924170616114
1974	1.1255924170616114
1975	1.0959715639810428
1976	1.066350710900474
1977	1.0367298578199051
1978	1.0071090047393365
1979	1.0071090047393365
1980	0.9478672985781991
1981	0.9774881516587678
1982	0.9478672985781991
1983	0.9478672985781991
1984	0.9478672985781991
1985	0.9478672985781991
1986	0.9478672985781991
1987	0.9182464454976302
1988	0.9182464454976302
1989	0.9478672985781991
1990	0.9478672985781991
1991	0.9774881516587678
1992	1.0071090047393365
1993	1.0367298578199051
1994	1.0367298578199051
1995	1.0367298578199051
1996	1.0071090047393365
1997	1.0071090047393365
1998	1.0071090047393365
1999	1.0367298578199051
2000	1.0367298578199051
2001	0.9774881516587678
2002	0.9774881516587678
2003	0.9478672985781991
2004	0.9212085308056872
2005	0.9419431279620853
2006	0.9686018957345971
2007	1.0041469194312795
2008	1.0337677725118484
2009	1.0524755410613698
2010	1.0791580195671509
2011	1.0794780545670224
2012	1.0616844602609727
2013	1.0715345799940637
2014	1.0774710596616206
2015	1.1286011286011286
2016	1.1286011286011286
2017	1.1286011286011286
2018	1.1286011286011286
2019	1.1196911196911197
2020	1.105138105138105
2021	1.098901098901099