Year	% of relevant age group
1973	44.9303894042969
1974	45.121768951416
1975	45.9282989501953
1976	46.4873199462891
1977	43.8209800720215
1978	44.4948883056641
1979	44.9117393493652
1980	45.3059883117676
1981	46.0832290649414
1982	47.2432708740234
1983	47.7030715942383
1984	49.7649192810059
1985	48.0361595153809
1986	48.3613815307617
1987	48.2452087402344
1988	47.9469795227051
1989	47.7311210632324
1990	48.6999588012695
1991	49.16162109375
1992	48.8759689331055
1993	49.7106094360352
1994	49.0913887023926
1995	49.4822807312012
1996	50.1558494567871
1997	50.2196617126465
1998	50.1246604919434
1999	50.9941101074219
2000	51.9657096862793
2001	53.7822303771973
2002	55.6862983703613
2003	57.2424011230469
2004	58.5863304138184
2005	60.9956016540527
2006	62.0753517150879
2007	63.1217002868652
2008	64.6311416625977
2009	67.8419418334961
2010	67.682861328125
2011	68.0171585083008
2012	67.7661666870117
2013	67.4148788452148
2014	67.3600921630859
2015	67.056266784668
2016	67.4149169921875
2017	68.0162200927734
2018	68.9613418579102
2019	69.0968475341797
2020	69.8516998291016
2021	70.4952392578125