Year	% of relevant age group
1975	20.261209487915
1976	20.2586097717285
1977	20.2145309448242
1978	20.1802101135254
1979	20.1564502716064
1980	20.2238006591797
1981	20.4488792419434
1982	20.4269104003906
1983	20.7482109069824
1984	20.9867000579834
1985	21.1498203277588
1986	21.2323894500732
1987	21.3430690765381
1988	21.6635303497314
1989	21.7168006896973
1990	21.7560291290283
1991	21.8542098999023
1992	21.8686008453369
1993	22.0239105224609
1994	22.0326309204102
1995	22.5646305084229
1996	22.7205009460449
1997	22.7785205841064
1998	23.1914196014404
1999	24.1672706604004
2000	25.4102401733398
2001	27.3343906402588
2002	28.471549987793
2003	28.8527603149414
2004	27.5686702728271
2005	28.1313095092773
2006	29.3444499969482
2007	30.6042194366455
2008	32.4838790893555
2009	34.0955581665039
2010	35.0240516662598
2011	36.8823890686035
2012	38.5242309570312
2013	39.9876098632812
2014	41.3925018310547
2015	42.8322601318359
2016	43.935131072998
2017	44.803768157959
2018	46.3221282958984
2019	46.3679695129395
2020	46.5069389343262