Year	% of relevant age group
1973	20.041690826416
1974	20.0547790527344
1975	19.9993495941162
1976	20.0176391601562
1977	20.1475505828857
1978	20.212890625
1979	20.2867603302002
1980	20.4007205963135
1981	20.4575996398926
1982	20.684549331665
1983	20.9468994140625
1984	21.2899303436279
1985	21.5956497192383
1986	21.8319301605225
1987	21.5689601898193
1988	21.3651599884033
1989	21.2919807434082
1990	21.2451095581055
1991	21.5424995422363
1992	21.5034999847412
1993	21.9088897705078
1994	22.2020797729492
1995	23.0887603759766
1996	23.5002899169922
1997	23.7071399688721
1998	23.9795207977295
1999	24.1926803588867
2000	24.5211791992188
2001	25.5043296813965
2002	27.4672508239746
2003	27.8351306915283
2004	28.2014904022217
2005	29.2182903289795
2006	30.4333000183105
2007	31.8092308044434
2008	33.4538192749023
2009	34.8400497436523
2010	36.2366485595703
2011	37.3137283325195
2012	38.093090057373
2013	38.7827110290527
2014	39.2534217834473
2015	40.2537384033203
2016	40.7337799072266
2017	41.2071418762207
2018	41.6663398742676
2019	42.0715217590332
2020	42.845401763916
2021	43.2732086181641