Year	% of relevant age group
1972	40.1916198730469
1973	40.6514892578125
1974	41.1756706237793
1975	41.9535903930664
1976	42.6421585083008
1977	43.6736297607422
1978	44.8994789123535
1979	46.4721488952637
1980	47.1839485168457
1981	48.393009185791
1982	49.0511703491211
1983	49.819019317627
1984	51.9269599914551
1985	50.067138671875
1986	50.1500396728516
1987	49.5032501220703
1988	48.5995483398438
1989	47.5946311950684
1990	48.462158203125
1991	49.1828117370605
1992	48.6822319030762
1993	49.6111106872559
1994	48.9413604736328
1995	49.0810012817383
1996	49.5140991210938
1997	49.1994895935059
1998	48.5697898864746
1999	48.6399612426758
2000	48.4917411804199
2001	49.8151817321777
2002	50.7660598754883
2003	51.8297004699707
2004	52.6356201171875
2005	54.9566612243652
2006	57.7068786621094
2007	57.8687896728516
2008	59.5007514953613
2009	63.2306900024414
2010	63.9543113708496
2011	63.6729888916016
2012	64.6058731079102
2013	64.7318878173828
2014	65.0701065063477
2015	65.4599075317383
2016	66.2398910522461
2017	66.6911315917969
2018	67.4778671264648
2019	67.7465591430664
2020	68.3380279541016
2021	69.0979614257812