Year	% of relevant age group
1974	37.8726387023926
1975	39.2335205078125
1976	39.924129486084
1977	41.0768394470215
1978	44.2156791687012
1979	45.0716781616211
1980	45.8495292663574
1981	46.1556701660156
1982	46.3310089111328
1983	47.0815200805664
1984	48.5331192016602
1985	49.3408699035645
1986	50.6862411499023
1987	50.9411888122559
1988	52.6522789001465
1989	53.7303314208984
1990	53.2944793701172
1991	53.9597282409668
1992	54.5129318237305
1993	54.6695404052734
1994	55.3030815124512
1995	55.9913597106934
1996	56.3975296020508
1997	55.9587707519531
1998	56.5114517211914
1999	57.0515594482422
2000	57.9502983093262
2001	60.1785583496094
2002	62.6820182800293
2003	62.5270805358887
2004	63.0011711120605
2005	63.9738311767578
2006	61.9758796691895
2007	60.802360534668
2008	60.1228713989258
2009	61.254451751709
2010	61.7119407653809
2011	63.1015586853027
2012	66.2711410522461
2013	64.2956237792969
2014	63.6006011962891
2015	63.6337013244629
2016	63.7433090209961
2017	63.0036811828613
2018	63.5206909179688
2019	64.534553527832
2020	64.9075088500977
2021	68.0009918212891
2022	66.3032302856445