Year	% of relevant age group
1974	36.9071388244629
1975	38.4792518615723
1976	39.286190032959
1977	40.5997695922852
1978	44.0921897888184
1979	45.0666885375977
1980	45.7948303222656
1981	45.8799781799316
1982	45.7705612182617
1983	46.3244895935059
1984	47.6681289672852
1985	49.4034194946289
1986	51.5007781982422
1987	51.8760299682617
1988	54.6901817321777
1989	56.091381072998
1990	56.893440246582
1991	56.4519195556641
1992	57.9778518676758
1993	59.0836486816406
1994	60.7822914123535
1995	61.3045310974121
1996	61.8972091674805
1997	61.5796089172363
1998	62.0944213867188
1999	62.602180480957
2000	63.3405685424805
2001	64.9545288085938
2002	66.9733810424805
2003	68.8119506835938
2004	68.3161315917969
2005	68.3764419555664
2006	65.7716598510742
2007	65.2490463256836
2008	64.7784271240234
2009	66.6629104614258
2010	66.2181167602539
2011	68.3804931640625
2012	72.5506286621094
2013	69.6529693603516
2014	68.0530395507812
2015	67.5049667358398
2016	67.2612762451172
2017	66.3341369628906
2018	66.7236404418945
2019	67.6994018554688
2020	68.1707763671875
2021	71.5863265991211
2022	69.6515121459961