Year	% of relevant age group
1972	47.1806793212891
1973	47.7407989501953
1974	47.828800201416
1975	48.4196395874023
1976	48.2856712341309
1977	47.7936897277832
1978	48.8492202758789
1979	49.7069702148438
1980	50.183708190918
1981	51.1405792236328
1982	51.9771003723145
1983	52.5297813415527
1984	54.1131782531738
1985	53.3090591430664
1986	53.8497009277344
1987	54.0474586486816
1988	54.0028686523438
1989	53.9455986022949
1990	54.5720901489258
1991	55.1181716918945
1992	55.0326995849609
1993	55.5845718383789
1994	55.4252815246582
1995	55.713508605957
1996	56.1269989013672
1997	56.1054191589355
1998	56.1593704223633
1999	56.8767318725586
2000	57.4612083435059
2001	58.622631072998
2002	59.7170715332031
2003	60.4906997680664
2004	61.2616691589355
2005	63.2538909912109
2006	64.8568801879883
2007	64.443717956543
2008	64.5434417724609
2009	67.3433227539062
2010	68.2244262695312
2011	67.9352798461914
2012	68.5168762207031
2013	68.0785293579102
2014	68.4121704101562
2015	68.7329711914062
2016	69.2379913330078
2017	69.8913269042969
2018	70.6835327148438
2019	70.9993515014648
2020	71.4498062133789
2021	71.8475189208984