Year	% of relevant age group
1978	32.3126182556152
1979	32.9451904296875
1980	33.1940498352051
1981	33.1478118896484
1982	32.540771484375
1983	33.2403602600098
1984	33.556510925293
1985	33.5262413024902
1986	33.6816902160645
1987	33.3553085327148
1988	33.5403289794922
1989	33.5335693359375
1990	33.7039794921875
1991	33.8498611450195
1992	33.8255805969238
1993	33.9924812316895
1994	34.0214996337891
1995	34.5730209350586
1996	34.6372985839844
1997	34.7849998474121
1998	35.0516014099121
1999	35.2698402404785
2000	35.9216384887695
2001	36.663631439209
2002	37.9977416992188
2003	39.0302391052246
2004	39.9039192199707
2005	40.3977317810059
2006	41.7146797180176
2007	42.9974212646484
2008	44.495548248291
2009	45.3469009399414
2010	46.1212692260742
2011	46.7891006469727
2012	47.7677612304688
2013	48.4312400817871
2014	49.403450012207
2015	49.9838790893555
2016	50.3950500488281
2017	50.4941787719727
2018	51.3138198852539
2019	51.2075119018555
2020	51.2273292541504