Year	% of relevant age group
1970	14.3890895843506
1971	15.7630596160889
1972	18.9899806976318
1973	22.7430000305176
1974	27.83424949646
1976	34.4643898010254
1977	35.6263084411621
1981	32.4142913818359
1982	36.6861305236816
1983	38.5724601745605
1984	39.0761604309082
1987	43.1824417114258
1988	42.2223701477051
1989	42.5086402893066
1991	45.1524696350098
1992	45.5111083984375
1993	46.9054489135742
1995	50.2371292114258
1996	49.5481185913086
2001	60.3067207336426
2002	64.9106063842773
2003	69.618408203125
2005	73.9449462890625
2006	73.0311889648438
2007	73.4279174804688
2008	72.2369003295898
2009	71.7403411865234
2010	77.4104766845703
2011	79.4501190185547
2012	82.0410690307617
2013	79.570686340332
2014	78.6323623657227
2015	79.2157211303711
2016	75.5102615356445