01170100 1968 75.2 700 1 19680318 4.10 1 19680901 01170100 1969 102 1270 1 19690423 6.50 2 01170100 1970 95.1 1100 1 19691108 4.50 1 19700816 01170100 1971 71.9 769 1 19710504 4.50 1 19710826 01170100 1972 109 1040 1 19720420 7.30 1 19720929 01170100 1973 136 2320 1 19730630 7.60 1 19721006 01170100 1974 89.4 1500 1 19731221 7.00 2 01170100 1975 96.8 848 1 19750320 17.0 3 01170100 1976 115 1180 1 19760401 9.10 1 19760909 01170100 1977 75.2 1480 1 19770314 8.20 2 01170100 1978 111 1050 1 19780109 7.20 2 01170100 1979 105 1470 1 19790525 6.00 2 01170100 1980 71.2 1360 1 19800410 5.00 3 01170100 1981 55.9 1410 1 19810220 5.90 2 01170100 1982 84.2 1140 1 19820418 7.40 5 01170100 1983 91.5 1530 1 19830319 3.30 2 01170100 1984 126 1570 1 19840530 5.10 1 19831001 01170100 1985 44.4 571 1 19850927 5.70 1 19850814 01170100 1986 87.0 760 1 19860315 14.0 2 01170100 1987 97.2 2420 1 19870331 5.80 2 01170100 1988 73.9 695 1 19880327 8.70 1 19880823