Year	% of total population
1960	15.850505082699698
1961	16.150420439940756
1962	16.407445442118576
1963	16.640152579411534
1964	16.861350721378763
1965	17.081561280579365
1966	17.316774881471467
1967	17.56503435695315
1968	17.83419788394077
1969	18.118723260789775
1970	18.41559886923248
1971	18.729451344827197
1972	18.80847742916252
1973	18.765591152124934
1974	18.727478580086963
1975	18.70023053876679
1976	18.69162820231644
1977	18.69675660143038
1978	18.714903815666535
1979	18.745763435964033
1980	18.79251335585042
1981	18.85544986055723
1982	18.879119506260906
1983	18.88808256633
1984	18.900479522336376
1985	18.912371799014053
1986	18.929508550536692
1987	18.94654442089617
1988	18.95717459841628
1989	18.963480254837943
1990	18.968951276498064
1991	18.977964559717826
1992	18.94996305004163
1993	18.906395767258626
1994	18.870634057779796
1995	18.838540425062472
1996	18.801533886193774
1997	18.760090020153147
1998	18.72327293931981
1999	18.68882169589434
2000	18.649137471341945
2001	18.607662078031947
2002	18.620623734303685
2003	18.610696038049035
2004	18.563410414575614
2005	18.545102109240787
2006	18.562498104919857
2007	18.542166944937318
2008	18.492995981707704
2009	18.482138150766986
2010	18.49894201699106
2011	18.541079759766717
2012	18.565486295475676
2013	18.4254533672606
2014	18.330928846830208
2015	18.422919115117324
2016	18.529179614174414
2017	18.632514364135652
2018	18.744154423836708
2019	19.004338941695757
2020	19.13942279940775
2021	19.280113718910368
2022	19.38553887251407
2023	19.48833503008944