Year	% of total population
1960	25.10237353210344
1961	25.15838504312089
1962	25.194201491490016
1963	25.13806046866607
1964	25.032402573950645
1965	24.936390935987077
1966	24.898804100460893
1967	24.890817661763798
1968	24.92369075585242
1969	24.9837549782128
1970	25.09042209821523
1971	25.166548435764852
1972	25.180290831691316
1973	25.213145111951484
1974	25.246236371977094
1975	25.285897946065077
1976	25.353773140506934
1977	25.43557416728872
1978	25.52555842583602
1979	25.616756133139436
1980	25.703243717924767
1981	25.802349573211515
1982	25.875351031720513
1983	25.94356259233404
1984	26.010372820021406
1985	26.069027261067518
1986	26.12636629150614
1987	26.17085876586107
1988	26.154593813726663
1989	26.1263147789674
1990	26.115130166114888
1991	26.08481835048797
1992	26.045742635407027
1993	26.01047649976821
1994	25.99676954502861
1995	26.017008702243732
1996	26.14236385528005
1997	26.255639659000447
1998	26.377211504685675
1999	26.49524726104025
2000	26.610559687842944
2001	26.69883158331689
2002	26.759755477347102
2003	26.828829198700515
2004	26.89457973731657
2005	26.92842958188089
2006	26.933108759060286
2007	26.91771836208438
2008	26.8876588204284
2009	26.853266148553978
2010	26.789977152215585
2011	26.623570517972755
2012	26.639237550027318
2013	26.69416036174682
2014	26.756836012164094
2015	26.78338215869229
2016	26.829871837797587
2017	26.90854052312944
2018	26.968622008787218
2019	27.004964757532875
2020	27.067910468198754
2021	27.129709106397744
2022	27.060613834859943
2023	26.89094743352388