Year	% of relevant age group
1971	97.3847274780273
1972	97.7910232543945
1973	96.3648986816406
1974	96.8267135620117
1975	96.3547668457031
1976	96.0962219238281
1977	97.1095962524414
1978	97.8440704345703
1979	96.7503814697266
1980	96.5853729248047
1981	95.8811492919922
1982	97.6846923828125
1983	98.4444427490234
1984	99.3487167358398
1985	100.202239990234