Year	% of total population
1960	81.074
1961	81.014
1962	80.939
1963	80.85900000000001
1964	80.779
1965	80.699
1966	80.618
1967	80.407
1968	80.156
1969	79.90299999999999
1970	79.64699999999999
1971	79.389
1972	79.248
1973	79.168
1974	79.088
1975	79.008
1976	78.92699999999999
1977	78.887
1978	78.867
1979	78.84700000000001
1980	78.827
1981	78.807
1982	78.8
1983	78.8
1984	78.8
1985	78.8
1986	78.8
1987	78.8
1988	78.8
1989	78.8
1990	78.8
1991	78.8
1992	78.742
1993	78.65299999999999
1994	78.564
1995	78.474
1996	78.384
1997	78.295
1998	78.20400000000001
1999	78.114
2000	78.023
2001	77.932
2002	78.059
2003	78.30199999999999
2004	78.543
2005	78.782
2006	79.019
2007	79.25
2008	79.476
2009	79.7
2010	79.922
2011	80.143
2012	80.376
2013	80.615
2014	80.851
2015	81.086
2016	81.319
2017	81.548
2018	81.757
2019	81.944
2020	82.111
2021	82.258
2022	82.384
2023	82.492