Year	% of total population
1960	18.58521807979239
1961	18.905218249704085
1962	19.17314667669194
1963	19.454988347237908
1964	19.741885494342828
1965	20.031750515378928
1966	20.32657209104498
1967	20.630496320966405
1968	20.93990347924981
1969	21.25250447183807
1970	21.58095817187594
1971	21.996407490600497
1972	22.402899455756987
1973	22.834455721528602
1974	23.279817070777604
1975	23.730494066256707
1976	24.182848936708684
1977	24.61215309690682
1978	25.04667613861007
1979	25.468680492044054
1980	25.837232925012263
1981	26.276097660043117
1982	26.69007010894733
1983	27.111435000574655
1984	27.540192386589954
1985	27.972226781250193
1986	28.412423501607353
1987	28.85679460625071
1988	29.29514416465243
1989	29.751146084998172
1990	30.239092020148085
1991	30.609503669947724
1992	30.983807960052108
1993	31.349455445369145
1994	31.714462100537506
1995	32.08039381926502
1996	32.45032770224597
1997	32.81906526506222
1998	33.177928923418854
1999	33.51814495210971
2000	33.86426890328955
2001	34.306034383432724
2002	34.7519657470966
2003	35.189961448699286
2004	35.631723188102285
2005	36.078805775751434
2006	36.53231121722216
2007	36.992750476184305
2008	37.459531732998315
2009	37.93130234549469
2010	38.41835605660278
2011	38.89022759352309
2012	39.341773361137186
2013	39.79869599549909
2014	40.26287712246835
2015	40.7325336533629
2016	41.20421942070667
2017	41.67530973113072
2018	42.15223569419202
2019	42.635930020312756
2020	43.124147266546174
2021	43.61693661875152
2022	44.114977149831766
2023	44.617624524450285