Year	% of total population
1960	11.5293313594392
1961	11.7023897494967
1962	11.8886284387721
1963	12.0691390577338
1964	12.2823548117186
1965	12.5110983112812
1966	12.7477208881164
1967	13.0068229915058
1968	13.2290515047718
1969	13.4265956697406
1970	13.6469077305131
1971	13.8748561068802
1972	14.1174732739705
1973	14.3733128508296
1974	14.6367214615759
1975	14.870286371028
1976	15.0596351273392
1977	15.2750334972819
1978	15.4967374862769
1979	15.666602199579
1980	15.6859405649318
1981	15.46622057676
1982	15.1103311758484
1983	14.7344738626001
1984	14.5163482867543
1985	14.5644392170472
1986	14.7149465882626
1987	14.824276153934
1988	14.8693645174612
1989	14.8746215585655
1990	14.8994101009906
1991	14.9532898538398
1992	15.0295885432622
1993	15.1515632536598
1994	15.3073906588459
1995	15.4791007080121
1996	15.6288872203266
1997	15.739549838636
1998	15.8457911910845
1999	16.0633288646776
2000	16.4322770456333
2001	16.8615092405231
2002	17.3137269709545
2003	17.8012101384259
2004	18.3728285517484
2005	18.9930491696761
2006	19.5604706859786
2007	19.9439801008158
2008	20.1890443981014
2009	20.4078777892587
2010	20.4544987284982
2011	20.4044580415222
2012	20.4554673178396
2013	20.5686904213959
2014	20.743886196754
2015	20.9504729349861
2016	21.1361287969973
2017	21.3105965559267
2018	21.4991247751245
2019	21.7302903981942
2020	21.9637344087494
2021	22.1702655211463
2022	22.4132250075126
2023	22.7469230985562