Year	% of relevant age group
1970	47.2769012451172
1971	47.2155685424805
1972	47.5186309814453
1973	47.955810546875
1974	48.4839286804199
1975	49.4070510864258
1976	50.1195602416992
1977	51.1792297363281
1978	52.4542694091797
1979	53.9186210632324
1980	54.4582595825195
1981	55.6363792419434
1982	56.3358192443848
1983	56.7455596923828
1984	58.6341705322266
1985	56.3987998962402
1986	56.3187217712402
1987	55.5596694946289
1988	54.6115188598633
1989	53.4992980957031
1990	54.2624397277832
1991	54.778450012207
1992	54.1443099975586
1993	54.9189300537109
1994	54.0723495483398
1995	54.1743087768555
1996	54.5608406066895
1997	54.1911201477051
1998	53.4551811218262
1999	53.4901885986328
2000	53.5689697265625
2001	55.1249389648438
2002	56.2334403991699
2003	57.241870880127
2004	58.2705192565918
2005	60.5775985717773
2006	63.3895416259766
2007	63.2727088928223
2008	63.9652786254883
2009	67.2301406860352
2010	67.4616775512695
2011	67.3580703735352
2012	67.4806518554688
2013	67.4838104248047
2014	67.5969619750977
2015	67.7910232543945
2016	68.2061920166016
2017	68.5595016479492
2018	69.3200378417969
2019	69.6371612548828
2020	70.2972564697266
2021	71.013542175293