Year	% of relevant age group
1973	20.0399303436279
1974	20.0560607910156
1975	20.0016593933105
1976	20.0210208892822
1977	20.1519603729248
1978	20.2197208404541
1979	20.2993507385254
1980	20.4182605743408
1981	20.4722805023193
1982	20.6978607177734
1983	20.9599800109863
1984	21.3020896911621
1985	21.6068992614746
1986	21.8425407409668
1987	21.5792503356934
1988	21.3752899169922
1989	21.3033008575439
1990	21.2565402984619
1991	21.5523109436035
1992	21.5127506256104
1993	21.9182796478271
1994	22.2122802734375
1995	23.0992794036865
1996	23.5103702545166
1997	23.7157592773438
1998	23.9882793426514
1999	24.2019290924072
2000	24.5289497375488
2001	25.5118007659912
2002	27.4738597869873
2003	27.8417892456055
2004	28.2083702087402
2005	29.2252292633057
2006	30.4402294158936
2007	31.8155498504639
2008	33.4595794677734
2009	34.8447113037109
2010	36.2412605285645
2011	37.3178291320801
2012	38.0967597961426
2013	38.7864990234375
2014	39.2577705383301
2015	40.2578811645508
2016	40.7377281188965
2017	41.2105407714844
2018	41.669979095459
2019	42.0750999450684
2020	42.8482513427734
2021	43.2765693664551