Year	% of relevant age group
1976	27.5214595794678
1977	27.9327507019043
1978	28.6790790557861
1979	29.3459396362305
1980	29.5342407226562
1981	29.3962306976318
1982	28.8148097991943
1983	29.6077499389648
1984	29.9649105072021
1985	29.9646301269531
1986	30.1606197357178
1987	29.8593292236328
1988	30.1072597503662
1989	30.1287097930908
1990	30.286190032959
1991	30.4848403930664
1992	30.5208301544189
1993	30.6660594940186
1994	30.7266902923584
1995	31.2434005737305
1996	31.3647003173828
1997	31.5350894927979
1998	31.8050193786621
1999	32.2884788513184
2000	33.0926818847656
2001	34.0866813659668
2002	35.4708518981934
2003	36.4140090942383
2004	36.548210144043
2005	37.1420211791992
2006	38.4889488220215
2007	39.7787895202637
2008	41.3663711547852
2009	42.4748611450195
2010	43.2905311584473
2011	44.244758605957
2012	45.3686714172363
2013	46.1331787109375
2014	47.0840492248535
2015	47.9224891662598
2016	48.5675315856934
2017	48.9142990112305
2018	49.9238204956055
2019	49.9914817810059
2020	50.0770416259766