Year	% of relevant age group
1973	60.8258514404297
1974	60.5049705505371
1975	61.4953384399414
1976	61.8454399108887
1977	62.8541717529297
1978	63.7303695678711
1979	63.8507804870605
1980	64.3755264282227
1981	65.0713500976562
1982	65.2118072509766
1983	64.7997512817383
1984	65.4551773071289
1985	65.6729278564453
1986	66.3554916381836
1987	65.5779724121094
1988	65.3558197021484
1989	65.422737121582
1990	66.0224227905273
1991	66.4240036010742
1992	65.6426467895508
1993	65.7089920043945
1994	64.789306640625
1995	64.1664199829102
1996	64.1760330200195
1997	63.7939491271973
1998	63.3111610412598
1999	62.9485092163086
2000	63.7760887145996
2001	65.3693313598633
2002	66.6587982177734
2003	68.0977935791016
2004	69.2079086303711
2005	71.1801910400391
2006	73.5393524169922
2007	71.7577896118164
2008	70.2414016723633
2009	71.6010437011719
2010	72.7212219238281
2011	72.6512985229492
2012	72.4857025146484
2013	71.2817306518555
2014	71.4539337158203
2015	71.3085708618164
2016	72.0638580322266
2017	72.4666595458984
2018	73.0937423706055
2019	73.5924301147461
2020	74.2205123901367
2021	74.6879577636719