Year	% of relevant age group
1972	37.4372482299805
1973	38.1651306152344
1974	39.1263198852539
1975	39.9748687744141
1976	40.7140693664551
1977	42.0730781555176
1978	43.4300918579102
1979	45.8736305236816
1980	46.7124481201172
1981	48.316291809082
1982	49.2252311706543
1983	50.3462409973145
1984	53.6766014099121
1985	50.5848197937012
1986	50.4597282409668
1987	49.247631072998
1988	47.8259201049805
1989	46.2557487487793
1990	47.5599212646484
1991	48.7419204711914
1992	47.6988716125488
1993	49.1685791015625
1994	48.0069618225098
1995	48.3121185302734
1996	48.5949516296387
1997	48.0526809692383
1998	46.7477912902832
1999	46.6758804321289
2000	46.0275611877441
2001	47.7588996887207
2002	49.0595703125
2003	50.387321472168
2004	51.5182991027832
2005	54.0191802978516
2006	56.8660507202148
2007	58.6743316650391
2008	62.226879119873
2009	66.53466796875
2010	66.8119506835938
2011	65.3146133422852
2012	65.6348571777344
2013	65.8458023071289
2014	66.0197372436523
2015	65.95654296875
2016	66.8360366821289
2017	67.9153594970703
2018	69.0454788208008
2019	69.4121704101562
2020	70.1640319824219
2021	71.0271835327148