Year	% of relevant age group
1975	57.1247711181641
1976	57.0071716308594
1977	55.9268188476562
1978	56.8978118896484
1979	57.6161918640137
1980	57.8982391357422
1981	58.7586517333984
1982	59.5589981079102
1983	59.8498382568359
1984	61.246898651123
1985	60.2331809997559
1986	60.6267013549805
1987	60.7049217224121
1988	60.6095695495605
1989	60.4884910583496
1990	61.058708190918
1991	61.5043983459473
1992	61.3256301879883
1993	61.751708984375
1994	61.442081451416
1995	61.6436805725098
1996	61.9305801391602
1997	61.8071899414062
1998	61.7720909118652
1999	62.3884391784668
2000	63.0115585327148
2001	64.1615905761719
2002	65.3063735961914
2003	65.8715362548828
2004	66.6617584228516
2005	68.4676132202148
2006	69.79052734375
2007	68.9206314086914
2008	68.4289016723633
2009	70.941162109375
2010	71.3323593139648
2011	70.9704208374023
2012	70.9312896728516
2013	70.4812469482422
2014	70.6759185791016
2015	70.8750610351562
2016	71.2006530761719
2017	71.8738708496094
2018	72.7265167236328
2019	72.8998413085938
2020	73.4137496948242
2021	73.7673187255859