Year	% of relevant age group
1971	34.1550788879395
1972	34.3714408874512
1973	35.3920097351074
1974	35.6532897949219
1975	36.3521614074707
1976	36.8825416564941
1977	35.1767997741699
1978	35.9658203125
1979	36.5624809265137
1980	37.1223487854004
1981	38.0709114074707
1982	39.2790412902832
1983	40.1197814941406
1984	42.4436416625977
1985	40.9724617004395
1986	41.4737815856934
1987	41.4948196411133
1988	41.3077011108398
1989	41.0833702087402
1990	42.114559173584
1991	42.8687210083008
1992	42.6354293823242
1993	43.6833686828613
1994	43.2645111083984
1995	43.7818984985352
1996	44.6246299743652
1997	44.8655815124512
1998	44.9429016113281
1999	46.0300788879395
2000	46.9175491333008
2001	48.7113914489746
2002	50.5633392333984
2003	52.1951904296875
2004	53.7046585083008
2005	56.3205795288086
2006	57.9085807800293
2007	59.0545616149902
2008	60.8839302062988
2009	64.5975036621094
2010	65.05078125
2011	65.167236328125
2012	65.4417419433594
2013	65.4511032104492
2014	65.6829528808594
2015	65.5654525756836
2016	66.2396774291992
2017	66.8650817871094
2018	67.666618347168
2019	67.7267379760742
2020	68.3496398925781
2021	69.0600967407227