Year	% of relevant age group
1973	25.6381797790527
1974	25.9740600585938
1975	26.5654792785645
1976	27.0669498443604
1977	26.3473491668701
1978	27.2558403015137
1979	28.039400100708
1980	28.7708492279053
1981	29.8940601348877
1982	31.1520004272461
1983	32.381649017334
1984	34.9705200195312
1985	33.7664184570312
1986	34.4436302185059
1987	34.603199005127
1988	34.5267295837402
1989	34.2985496520996
1990	35.3939018249512
1991	36.447681427002
1992	36.2667999267578
1993	37.5311508178711
1994	37.3073806762695
1995	37.9437408447266
1996	38.9622383117676
1997	39.3916893005371
1998	39.6441802978516
1999	40.9542007446289
2000	41.7555618286133
2001	43.5255393981934
2002	45.3259201049805
2003	47.0377502441406
2004	48.717601776123
2005	51.5511894226074
2006	53.6618003845215
2007	54.9120788574219
2008	57.0652084350586
2009	61.2902908325195
2010	62.3694000244141
2011	62.2639808654785
2012	63.0734786987305
2013	63.4495010375977
2014	63.9734115600586
2015	64.0479583740234
2016	65.0422821044922
2017	65.6909332275391
2018	66.3457489013672
2019	66.32958984375
2020	66.817497253418
2021	67.5955123901367