Year	% of total population
1960	55.57314590960476
1961	56.10172289908317
1962	56.62802856475496
1963	57.17962317696148
1964	57.73056930987619
1965	58.29132721442067
1966	58.84923021446969
1967	59.392688920559436
1968	59.91799792432465
1969	60.415768625101734
1970	60.905873284292085
1971	61.38148692812075
1972	61.8468686173751
1973	62.29890089768585
1974	62.741029808732044
1975	63.150359948126464
1976	63.53371505444955
1977	63.91946234131352
1978	64.30939793245767
1979	64.66317097216437
1980	64.97313487759489
1981	65.3103725769117
1982	65.61267005625086
1983	65.89628039985533
1984	66.16939812658198
1985	66.43301806097412
1986	66.69101529844367
1987	66.96935366528945
1988	67.24663009202878
1989	67.44793949705918
1990	67.59222415505843
1991	67.72162351828966
1992	67.83266760848379
1993	67.93745008283422
1994	68.04894132985602
1995	68.16157966961477
1996	68.26322290944091
1997	68.36563053375787
1998	68.47386594276921
1999	68.59105202237113
2000	68.71997529318583
2001	68.87505989317573
2002	69.07592344222583
2003	69.28657822897922
2004	69.4997495244159
2005	69.71547309528702
2006	69.93010696095622
2007	70.14732485378595
2008	70.3598256851373
2009	70.5641733752768
2010	70.75977725864081
2011	70.93743058159768
2012	71.11353548503675
2013	71.28630469786408
2014	71.4581461182868
2015	71.63713899431899
2016	71.82160514037906
2017	72.01060519360054
2018	72.2064181878859
2019	72.40933908982923
2020	72.61290371091924
2021	72.81590693162212
2022	73.07085796113745
2023	73.30692207877014