Year	% of relevant age group
1970	17.8409004211426
1971	17.717960357666
1972	17.9071598052979
1973	17.9254207611084
1974	17.8625202178955
1975	17.8691692352295
1976	17.877649307251
1977	18.0550899505615
1978	18.2799091339111
1979	18.3645401000977
1980	18.7049808502197
1981	18.9370899200439
1982	18.869140625
1983	18.8774700164795
1984	18.9734497070312
1985	18.9854698181152
1986	18.8280601501465
1987	18.6256809234619
1988	18.8254108428955
1989	18.7026996612549
1990	18.987979888916
1991	19.3248100280762
1992	18.9960098266602
1993	19.488410949707
1994	19.4463691711426
1995	20.3537998199463
1996	20.4640197753906
1997	20.6082191467285
1998	20.7112293243408
1999	20.9180297851562
2000	21.5591201782227
2001	21.9907398223877
2002	23.1729793548584
2003	23.8562107086182
2004	24.6578807830811
2005	25.8270397186279
2006	27.3482208251953
2007	29.0144805908203
2008	31.3297996520996
2009	32.7061004638672
2010	34.0760116577148
2011	35.2115211486816
2012	35.9706497192383
2013	36.8443794250488
2014	37.9346504211426
2015	38.9443511962891
2016	39.3579902648926
2017	39.697078704834
2018	40.2061614990234
2019	40.4724082946777
2020	41.0100898742676
2021	41.2884788513184