Year	% of relevant age group
1972	46.8696212768555
1973	47.9626312255859
1974	48.2733688354492
1975	48.9326286315918
1976	49.0509185791016
1977	50.0528182983398
1978	51.3199005126953
1979	52.3341217041016
1980	52.1991500854492
1981	52.0472717285156
1982	52.1005096435547
1983	51.5296592712402
1984	51.7344589233398
1985	52.0824394226074
1986	51.3940315246582
1987	51.3918685913086
1988	50.4892387390137
1989	53.1180381774902
1990	52.597900390625
1991	54.1244888305664
1992	53.3660697937012
1993	54.1739082336426
1994	54.6131401062012
1995	55.1100807189941
1996	55.2199096679688
1997	55.2419395446777
1998	55.7581596374512
1999	55.6060791015625
2000	56.1513404846191
2001	56.271068572998
2002	57.1158905029297
2003	58.6348304748535
2004	60.0988807678223
2005	60.6427001953125
2006	61.950740814209
2007	62.0647506713867
2008	62.4558601379395
2009	65.0398864746094
2010	65.8892517089844
2011	66.9889297485352
2012	67.2182464599609
2013	67.1570434570312
2014	67.0263214111328
2015	67.7373580932617
2016	68.2333374023438
2017	68.4948120117188
2018	67.9079666137695
2019	67.9384613037109
2020	68.0331573486328
2021	69.2774505615234