Year	% of relevant age group
1972	23.3674507141113
1973	23.5170593261719
1974	23.4350109100342
1975	23.58131980896
1976	23.5863800048828
1977	23.5727996826172
1978	23.6408596038818
1979	23.655460357666
1980	23.8715896606445
1981	24.1214809417725
1982	23.9804096221924
1983	24.2569007873535
1984	24.4700794219971
1985	24.593900680542
1986	24.5847396850586
1987	24.5817794799805
1988	24.8510093688965
1989	24.8021602630615
1990	24.7982597351074
1991	24.8268909454346
1992	24.7527904510498
1993	25.0258598327637
1994	25.0545997619629
1995	25.7436599731445
1996	25.8744602203369
1997	25.8978805541992
1998	26.3154697418213
1999	26.9807300567627
2000	28.1123294830322
2001	29.4971904754639
2002	30.4920406341553
2003	30.9157695770264
2004	30.8512992858887
2005	31.3468894958496
2006	32.5803909301758
2007	33.9269981384277
2008	35.6835594177246
2009	37.0342216491699
2010	37.8771896362305
2011	39.4150810241699
2012	40.8772087097168
2013	42.127010345459
2014	43.698299407959
2015	44.6291618347168
2016	45.3317489624023
2017	45.926139831543
2018	47.1901092529297
2019	47.0552787780762
2020	47.1066284179688