Year	% of relevant age group
1972	37.5933685302734
1973	38.5635108947754
1974	38.6534118652344
1975	39.2384986877441
1976	39.5442810058594
1977	40.0479393005371
1978	40.3914909362793
1979	41.5436096191406
1980	40.7338600158691
1981	39.978630065918
1982	40.4127082824707
1983	41.0747413635254
1984	40.9635314941406
1985	41.2004890441895
1986	40.5076789855957
1987	40.0032501220703
1988	38.1727714538574
1989	42.9917907714844
1990	42.1258392333984
1991	44.5283699035645
1992	44.2828903198242
1993	46.0920295715332
1994	46.635181427002
1995	47.5105781555176
1996	48.0865592956543
1997	47.8478317260742
1998	48.46337890625
1999	48.1043281555176
2000	47.9049987792969
2001	48.7991485595703
2002	49.3225212097168
2003	51.2924003601074
2004	52.7888488769531
2005	54.1560096740723
2006	55.7359809875488
2007	55.4345397949219
2008	55.9150505065918
2009	58.9049415588379
2010	60.0955505371094
2011	61.4999389648438
2012	62.1931381225586
2013	62.4490509033203
2014	63.1112098693848
2015	63.1890487670898
2016	64.8329925537109
2017	65.6440811157227
2018	65.784309387207
2019	65.6915817260742
2020	65.6921234130859
2021	66.9898681640625