Year	% of relevant age group
1971	11.6564502716064
1972	10.6105804443359
1973	12.0460395812988
1974	11.0232801437378
1999	32.358959197998
2000	36.1409912109375
2001	35.1853294372559
2002	35.7432289123535
2003	38.6673011779785
2004	38.7818794250488
2005	40.0818481445312
2006	42.8240699768066
2007	42.0356101989746
2009	46.2254600524902
2010	48.0417900085449
2014	57.2005615234375
2016	64.4421997070312
2017	73.0697174072266
2018	77.4017486572266