Year	% of relevant age group
1975	39.4694213867188
1976	39.3194694519043
1977	39.4343681335449
1978	40.579158782959
1979	41.5825805664062
1980	42.2597007751465
1981	43.3120498657227
1982	44.1837310791016
1983	45.0031509399414
1984	46.774341583252
1985	46.1871910095215
1986	46.8764190673828
1987	47.1966400146484
1988	47.2036018371582
1989	47.2152709960938
1990	47.8990592956543
1991	48.5470199584961
1992	48.5572204589844
1993	49.2372283935547
1994	49.226001739502
1995	49.5957298278809
1996	50.1417388916016
1997	50.229850769043
1998	50.3779907226562
1999	51.2038192749023
2000	51.7484703063965
2001	52.9182395935059
2002	53.9601211547852
2003	54.951301574707
2004	55.7042808532715
2005	57.890209197998
2006	59.7828903198242
2007	59.8425788879395
2008	60.5494003295898
2009	63.6438293457031
2010	65.0301513671875
2011	64.81494140625
2012	66.0355911254883
2013	65.6092681884766
2014	66.0853271484375
2015	66.5348815917969
2016	67.2216415405273
2017	67.8536529541016
2018	68.5822296142578
2019	69.046142578125
2020	69.4308166503906
2021	69.8724899291992