Year	% of total population
1960	22.1245574447917
1961	22.223023977287
1962	22.2802148454379
1963	22.2495824240488
1964	22.1199720707423
1965	21.9458122641982
1966	21.7882982682372
1967	21.6677365884095
1968	21.6000227554565
1969	21.5270700918339
1970	21.4325772337563
1971	21.3617342937607
1972	21.2732744456649
1973	21.1264283750534
1974	20.95190112152
1975	20.7741656715259
1976	20.588297427108
1977	20.4203681469023
1978	20.2976436950816
1979	20.2410236669585
1980	20.2694556358529
1981	20.3394175771652
1982	20.4229608642484
1983	20.5557894768945
1984	20.7070910765799
1985	20.8166798739334
1986	20.9041928474129
1987	21.0015864134843
1988	21.1047658764517
1989	21.1727757010873
1990	21.204503175626
1991	21.2037750413966
1992	21.1452735352485
1993	21.0181862553117
1994	20.8149231072325
1995	20.5142072419494
1996	20.0972857262643
1997	19.580079707741
1998	18.9577015656265
1999	18.2780888416575
2000	17.6255506985389
2001	16.9660733211981
2002	16.2933163209156
2003	15.708621469685
2004	15.2133276605596
2005	14.7738862009895
2006	14.430583239901
2007	14.2053065803085
2008	14.1192943491759
2009	14.129827215758
2010	14.1747169503369
2011	14.2653687528106
2012	14.4182318580313
2013	14.6241188410556
2014	14.8154511175566
2015	14.9839265906927
2016	15.18480589579
2017	15.3893943947464
2018	15.5239855953913
2019	15.6135838487328
2020	15.6502562923947
2021	15.626395804728
2022	15.5603352549995
2023	15.4348008413235