Year	% of total population
1960	66.832
1961	66.44
1962	66.045
1963	65.649
1964	65.249
1965	64.848
1966	64.445
1967	64.03999999999999
1968	63.632
1969	63.223
1970	63.124
1971	63.393
1972	63.663
1973	63.93
1974	64.19800000000001
1975	64.464
1976	64.72999999999999
1977	64.994
1978	65.257
1979	65.49799999999999
1980	65.711
1981	65.922
1982	66.134
1983	66.345
1984	66.555
1985	66.765
1986	66.97399999999999
1987	67.182
1988	67.39
1989	67.769
1990	68.342
1991	68.91
1992	69.473
1993	70.02799999999999
1994	70.57900000000001
1995	71.123
1996	71.662
1997	72.194
1998	72.72
1999	73.24
2000	73.499
2001	73.497
2002	73.495
2003	73.493
2004	73.492
2005	73.49
2006	73.488
2007	73.486
2008	73.48400000000001
2009	73.482
2010	73.48
2011	73.479
2012	73.455
2013	73.411
2014	73.345
2015	73.258
2016	73.149
2017	73.018
2018	72.866
2019	72.691
2020	72.494
2021	72.274
2022	72.032
2023	71.76599999999999