Year	% of relevant age group
1972	16.5701103210449
1973	16.5544395446777
1974	16.4234790802002
1975	16.5661201477051
1976	16.8979606628418
1977	17.0169105529785
1978	17.1414203643799
1979	17.4445095062256
1980	17.9976501464844
1981	18.2764301300049
1982	18.2572002410889
1983	18.4889907836914
1984	18.5316295623779
1985	18.6973400115967
1986	18.3572692871094
1987	18.1576309204102
1988	18.2656307220459
1989	18.0753402709961
1990	17.8361301422119
1991	17.7964706420898
1992	17.6977195739746
1993	17.7457103729248
1994	17.6056900024414
1995	18.3116207122803
1996	18.4028606414795
1997	18.3091506958008
1998	18.4538707733154
1999	18.557409286499
2000	19.2185897827148
2001	19.7295398712158
2002	20.4869594573975
2003	21.2109699249268
2004	22.0158004760742
2005	22.9449691772461
2006	24.2483100891113
2007	25.5037498474121
2008	27.1585006713867
2009	28.2890701293945
2010	29.4942893981934
2011	30.5026607513428
2012	30.9867496490479
2013	31.639289855957
2014	32.721118927002
2015	33.9500198364258
2016	34.8600997924805
2017	35.6437797546387
2018	36.3865585327148
2019	37.0514106750488
2020	37.7710304260254
2021	38.1742401123047