Year	% of total population
1960	63.223
1961	63.151
1962	63.078
1963	63.005
1964	62.932
1965	62.859
1966	62.786
1967	62.713
1968	62.64
1969	62.567
1970	62.45
1971	62.191
1972	61.93
1973	61.669
1974	61.408
1975	61.145
1976	60.882
1977	60.619
1978	60.354
1979	60.09
1980	59.898
1981	60.172
1982	60.446
1983	60.72
1984	60.993
1985	61.264
1986	61.536
1987	61.806
1988	62.077
1989	62.346
1990	62.63
1991	62.994
1992	63.357
1993	63.717
1994	64.076
1995	64.434
1996	64.78999999999999
1997	65.144
1998	65.497
1999	65.848
2000	66.173
2001	66.37100000000001
2002	66.569
2003	66.76599999999999
2004	66.963
2005	67.15899999999999
2006	67.354
2007	67.549
2008	67.744
2009	67.937
2010	68.13
2011	68.3
2012	68.447
2013	68.571
2014	68.672
2015	68.751
2016	68.807
2017	68.84100000000001
2018	68.85300000000001
2019	68.842
2020	68.809
2021	68.754
2022	68.676
2023	68.575