Year	% of relevant age group
1971	95.8564376831055
1972	96.3212738037109
1973	94.5926208496094
1974	95.0193405151367
1975	94.5657730102539
1976	94.1491012573242
1977	95.5066528320312
1978	95.8274536132812
1979	95.0130386352539
1980	94.8117828369141
1981	93.5513000488281
1982	95.4299392700195
1983	96.4766387939453
1984	97.201301574707
1985	97.9226531982422