Year	% of relevant age group
1971	13.0004997253418
1972	12.1106996536255
1973	13.493709564209
1974	12.873929977417
1999	31.5887908935547
2000	35.147590637207
2001	36.0249710083008
2002	36.6955718994141
2003	36.5821800231934
2004	41.2983589172363
2005	40.6402282714844
2006	42.2527389526367
2007	40.5933799743652
2009	45.4320182800293
2010	45.8520698547363
2014	54.3150100708008
2016	59.9793014526367
2017	67.8541564941406
2018	72.3881378173828