Year	% of relevant age group
1971	31.5258693695068
1972	34.1098899841309
1974	35.0413513183594
1975	34.1534309387207
1991	41.7166900634766
1992	42.1610298156738
1999	41.4636306762695
2000	43.0173416137695
2001	41.3498382568359
2002	45.1967391967773
2003	43.6073112487793
2004	45.0537300109863
2005	47.6116218566895
2008	57.0538101196289
2009	64.7203674316406
2011	61.5316505432129
2012	60.8123588562012
2013	63.6840591430664
2014	62.4598999023438
2015	69.0957489013672
2017	67.7480010986328
2018	72.5030670166016
2019	73.5298385620117