Year	% of relevant age group
1972	38.339038848877
1973	39.1464195251465
1974	39.2212715148926
1975	39.4421195983887
1976	39.4667892456055
1977	39.9433708190918
1978	40.265941619873
1979	41.5528182983398
1980	40.564811706543
1981	40.0273208618164
1982	40.3555297851562
1983	40.7540702819824
1984	41.0336799621582
1985	41.0925598144531
1986	40.2344093322754
1987	39.6868209838867
1988	38.1021194458008
1989	42.0603904724121
1990	41.2913818359375
1991	43.2246017456055
1992	43.151611328125
1993	44.8568115234375
1994	45.6011695861816
1995	46.5641593933105
1996	47.0058403015137
1997	47.1008491516113
1998	47.9281387329102
1999	47.7341690063477
2000	48.0234413146973
2001	48.8403282165527
2002	49.7323303222656
2003	51.2285308837891
2004	52.8489608764648
2005	54.0829696655273
2006	55.4763107299805
2007	55.0979309082031
2008	55.4887084960938
2009	58.3510208129883
2010	59.5039482116699
2011	60.888240814209
2012	61.5671997070312
2013	61.6880416870117
2014	61.9920501708984
2015	62.3311500549316
2016	63.498950958252
2017	64.2416610717773
2018	64.1401672363281
2019	63.9982299804688
2020	64.2595825195312
2021	65.7012481689453