Year	% of relevant age group
1970	22.0289402008057
1971	21.9393997192383
1972	21.9507904052734
1973	22.1236000061035
1974	21.6902599334717
1975	21.7735595703125
1976	21.9945793151855
1977	22.0638809204102
1978	22.3401908874512
1979	22.6190204620361
1980	23.2786598205566
1981	23.604700088501
1982	23.288990020752
1983	23.4423198699951
1984	23.4705600738525
1985	23.5646095275879
1986	23.238410949707
1987	22.9746208190918
1988	23.0869007110596
1989	22.7210006713867
1990	22.3404293060303
1991	22.146110534668
1992	21.7774200439453
1993	22.0224208831787
1994	21.978120803833
1995	23.0440902709961
1996	23.1434898376465
1997	23.0199394226074
1998	23.1848392486572
1999	23.2441997528076
2000	23.981840133667
2001	24.6040802001953
2002	25.3496208190918
2003	26.1370792388916
2004	27.0148906707764
2005	28.0435600280762
2006	29.4147701263428
2007	30.727970123291
2008	32.4429512023926
2009	33.3405494689941
2010	34.2967300415039
2011	35.115608215332
2012	35.2984199523926
2013	35.6441688537598
2014	37.3298187255859
2015	38.1010589599609
2016	38.6963195800781
2017	39.0196685791016
2018	39.449031829834
2019	39.7601509094238
2020	40.1758995056152
2021	40.5576705932617