Year	% of total population
1960	18.27826638494531
1961	18.48751567549595
1962	18.733616090089576
1963	18.985164625708002
1964	19.24291709915266
1965	19.50440454443043
1966	19.767949869706566
1967	20.044068963073894
1968	20.327491787776523
1969	20.61537722019043
1970	20.908627549244468
1971	21.244042001696897
1972	21.63322520518936
1973	22.01824398141132
1974	22.414026713836755
1975	22.67114787415948
1976	23.09871625481412
1977	23.52275000360405
1978	23.92553135248885
1979	24.319309576948868
1980	24.74271436494987
1981	25.14966584731713
1982	25.458135091755707
1983	25.772923728264097
1984	26.09646999241141
1985	26.427441257323427
1986	26.764287988420165
1987	27.101960488389647
1988	27.44022388340581
1989	27.780908158489115
1990	28.175546228480705
1991	28.466145603943037
1992	28.736858735743674
1993	29.001205978486567
1994	29.267772043362378
1995	29.527788963119768
1996	29.79328269483901
1997	30.0640024240263
1998	30.33413755262209
1999	30.60230038602714
2000	30.878811363508447
2001	31.2067138449723
2002	31.581762292600416
2003	31.96287537834179
2004	32.34837147387805
2005	32.7430794756753
2006	33.14652684144704
2007	33.55494302932066
2008	33.96367860581518
2009	34.376801830703705
2010	34.796915942679504
2011	35.226314071019424
2012	35.657371729302824
2013	36.10951515454771
2014	36.580745347691916
2015	37.045785545536866
2016	37.504643796321325
2017	37.96771980640371
2018	38.441035409288496
2019	38.92469992613001
2020	39.41817893758412
2021	39.92190390743256
2022	40.43746870644483
2023	40.9606602965532