Year	% of relevant age group
1970	47.2699699401855
1971	47.2068481445312
1972	47.5083694458008
1973	47.9458885192871
1974	48.4744987487793
1975	49.3980102539062
1976	50.1102409362793
1977	51.1711883544922
1978	52.4456787109375
1979	53.9106101989746
1980	54.4506797790527
1981	55.6301498413086
1982	56.3295707702637
1983	56.7383117675781
1984	58.6284599304199
1985	56.3933982849121
1986	56.3113594055176
1987	55.5537490844727
1988	54.6064605712891
1989	53.4935417175293
1990	54.2559700012207
1991	54.7722015380859
1992	54.1391410827637
1993	54.9140090942383
1994	54.0669212341309
1995	54.1687889099121
1996	54.5553016662598
1997	54.1859016418457
1998	53.4503517150879
1999	53.4853096008301
2000	53.5644493103027
2001	55.1202507019043
2002	56.228931427002
2003	57.2377891540527
2004	58.2667808532715
2005	60.5738716125488
2006	63.3862380981445
2007	63.2699012756348
2008	63.9629096984863
2009	67.2277908325195
2010	67.4591827392578
2011	67.3557281494141
2012	67.4787979125977
2013	67.4818572998047
2014	67.5948028564453
2015	67.7890014648438
2016	68.2038497924805
2017	68.5579299926758
2018	69.3182678222656
2019	69.6356887817383
2020	70.2957229614258
2021	71.0122985839844