Year	% of relevant age group
1970	24.8937301635742
1971	27.1065406799316
1972	28.4364795684814
1973	29.2123699188232
1974	31.940580368042
1975	33.5902481079102
1976	34.4555702209473
1977	35.1710510253906
1978	36.5791893005371
1979	38.7746391296387
1980	40.3011512756348
1981	40.3310813903809
1982	42.1413917541504
1983	43.0815696716309
1984	44.7204093933105
1985	45.1399383544922
1986	46.4983711242676
1987	47.215690612793
1988	48.4086685180664
1989	49.6134414672852
1990	50.1499290466309
1991	50.7496490478516
1992	51.5408592224121
1993	51.9135513305664
1994	53.0263481140137
1995	54.0023384094238
1996	55.3150482177734
1997	56.8478317260742
1998	57.7022895812988
1999	58.3005409240723
2000	59.2275314331055
2001	59.8897399902344
2002	61.5052680969238
2003	62.3605804443359
2004	63.3310813903809
2005	64.9513320922852
2006	65.3429565429688
2007	65.8739929199219
2008	66.7349166870117
2009	67.98681640625
2010	68.8626327514648
2011	68.7816619873047
2012	68.2233505249023
2013	68.19921875
2014	68.2794876098633
2015	70.4730682373047
2016	71.8447799682617
2017	71.9826583862305
2018	71.1805419921875
2019	71.2604370117188
2020	71.2801132202148
2021	72.7721786499023
2022	72.506721496582