Year	% of relevant age group
1972	22.5292892456055
1973	23.2980098724365
1974	23.1347808837891
1975	23.3611602783203
1976	21.6510200500488
1977	22.1225605010986
1978	23.1286392211914
1979	24.0985794067383
1980	24.2428302764893
1981	23.9379405975342
1982	23.115140914917
1983	24.4224491119385
1984	24.9181098937988
1985	24.8917903900146
1986	25.2120895385742
1987	24.7073402404785
1988	25.0675601959229
1989	25.0390491485596
1990	25.153450012207
1991	25.3982696533203
1992	25.47287940979
1993	25.5986003875732
1994	25.6846694946289
1995	26.2821807861328
1996	26.4640102386475
1997	26.6902503967285
1998	27.0188694000244
1999	28.0370407104492
2000	29.3108501434326
2001	30.6743793487549
2002	31.8548698425293
2003	32.3948097229004
2004	31.3247394561768
2005	32.0273818969727
2006	33.2462882995605
2007	34.4039115905762
2008	36.2228012084961
2009	37.8955917358398
2010	38.7732810974121
2011	40.316650390625
2012	41.7396507263184
2013	42.7650985717773
2014	44.0108413696289
2015	45.5262603759766
2016	46.5450897216797
2017	47.4226493835449
2018	49.0103912353516
2019	49.1631698608398
2020	49.4507904052734
2021	49.5244483947754