Year	% of total population
1960	10.970900748722114
1961	11.41691826929074
1962	11.68708517683146
1963	11.964511129781059
1964	12.248188683127402
1965	12.53277091729928
1966	12.819056392153104
1967	13.107032771709125
1968	13.400939708703415
1969	13.70005463515764
1970	13.977238592738036
1971	14.259452240422387
1972	14.548202938111801
1973	14.84168507424185
1974	15.15243755320507
1975	15.491007983086902
1976	15.824341681793486
1977	16.055111460417532
1978	16.30595088552379
1979	16.550674870616703
1980	16.785290826279496
1981	17.00610164440402
1982	17.21823409657692
1983	17.42470763337035
1984	17.62904575529885
1985	17.82212199447759
1986	18.001545250738165
1987	18.174292678684026
1988	18.336431608252095
1989	18.350899064605688
1990	18.36641210636782
1991	18.387037160982782
1992	18.41855190172091
1993	18.458617533155103
1994	18.516603962196967
1995	18.597779762741144
1996	18.702192578597675
1997	18.821793730325858
1998	18.94912350297348
1999	19.072931300564093
2000	19.191208998662137
2001	19.303509640293793
2002	19.41048723350964
2003	19.439409865576746
2004	19.451884347346795
2005	19.455029256727936
2006	19.446974520186515
2007	19.4330029162385
2008	19.418814009584324
2009	19.395657033697912
2010	19.366628622341317
2011	19.335462896516585
2012	19.304067697952355
2013	19.274283983469317
2014	19.243834853175752
2015	19.212358774245043
2016	19.182704288337966
2017	19.1526035485509
2018	19.123187172393752
2019	19.105723651864242
2020	19.106954682735342
2021	19.137604937452302
2022	19.20717694488056
2023	19.307011932503237