Year	% of relevant age group
1970	37.4374809265137
1971	37.6587905883789
1972	38.0068092346191
1973	38.7236404418945
1974	38.8096313476562
1975	39.5148506164551
1976	39.245059967041
1977	38.4023818969727
1978	39.7026405334473
1979	40.2861595153809
1980	41.0425415039062
1981	42.3080902099609
1982	43.3824195861816
1983	44.1130790710449
1984	46.3140182495117
1985	44.9959487915039
1986	45.6158103942871
1987	45.7324714660645
1988	45.5730209350586
1989	45.3963890075684
1990	46.2889289855957
1991	47.154899597168
1992	47.0171203613281
1993	47.7743797302246
1994	47.4810485839844
1995	47.8674011230469
1996	48.5427093505859
1997	48.5672607421875
1998	48.7392082214355
1999	49.9395790100098
2000	50.7564506530762
2001	52.4321594238281
2002	54.2545318603516
2003	55.7419891357422
2004	57.0082015991211
2005	59.6299705505371
2006	61.0722885131836
2007	62.0631408691406
2008	63.7890014648438
2009	67.2651901245117
2010	67.8947372436523
2011	67.9250869750977
2012	68.1601181030273
2013	67.2061309814453
2014	67.372673034668
2015	67.5080184936523
2016	68.1027221679688
2017	68.7617111206055
2018	69.5313568115234
2019	69.651481628418
2020	70.2606964111328
2021	70.8896331787109