Year	% of relevant age group
1972	29.686990737915
1973	30.6085090637207
1974	30.1748504638672
1975	30.3069496154785
1976	28.7438907623291
1977	29.2007503509521
1978	30.2808494567871
1979	31.1770191192627
1980	31.4999294281006
1981	31.2840309143066
1982	30.3488903045654
1983	31.378210067749
1984	31.7351493835449
1985	31.6265392303467
1986	31.8313694000244
1987	31.2384796142578
1988	31.4624691009521
1989	31.3049297332764
1990	31.3962001800537
1991	31.6299095153809
1992	31.5366592407227
1993	31.7660694122314
1994	31.8054599761963
1995	32.5565986633301
1996	32.6135597229004
1997	32.7778282165527
1998	33.1069107055664
1999	33.324779510498
2000	34.1882019042969
2001	34.9169006347656
2002	35.8629112243652
2003	36.4923706054688
2004	37.6431884765625
2005	38.2330284118652
2006	39.4836807250977
2007	40.7700805664062
2008	42.4554595947266
2009	43.3730087280273
2010	44.1422500610352
2011	45.0620384216309
2012	46.1056594848633
2013	46.7624282836914
2014	48.2325782775879
2015	48.8141403198242
2016	49.0574111938477
2017	49.4277305603027
2018	50.4657707214355
2019	50.1843414306641
2020	50.2816581726074
2021	50.3486518859863