11160000 1952 93.3 2290 1 19520112 1.10 1 19511016 11160000 1953 37.5 1200 1 19521207 3.60 1 19530913 11160000 1954 25.8 474 1 19540213 2.30 4 11160000 1955 20.8 268 1 19550118 1.20 1 19550903 11160000 1956 98.6 8800 1 19551223 1.40 1 19551009 11160000 1957 18.8 518 1 19570518 2.50 3 11160000 1958 83.1 2000 1 19580402 3.60 4 11160000 1959 27.2 1330 1 19590109 2.00 1 19590814 11160000 1960 17.1 676 1 19600201 1.30 2 11160000 1961 4.53 52.0 1 19601126 0.90 4 11160000 1962 31.4 1180 1 19620215 0.80 1 19620801 11160000 1963 86.7 4150 1 19630131 1.20 1 19621001 11160000 1964 13.8 460 1 19640121 0.10 2 11160000 1965 50.9 1610 1 19641222 0.80 1 19641021 11160000 1966 12.6 239 1 19651225 0.60 1 19660716 11160000 1967 74.9 2330 1 19670121 1.00 1 19661014 11160000 1968 16.6 882 1 19680130 1.00 3 11160000 1969 74.2 1500 1 19690119 1.30 2 11160000 1970 61.5 1470 1 19700116 1.40 3 11160000 1971 31.3 585 1 19701129 0.23 1 19710914 11160000 1972 8.49 202 1 19720205 0.11 1 19720806 11160000 1973 70.1 1380 1 19730116 0.56 1 19721002 11160000 1974 64.7 1250 1 19740301 1.50 1 19731005 11160000 1975 35.2 873 1 19750213 1.80 1 19750925 11160000 1976 4.55 52.0 1 19760302 0.22 3 11160000 1977 2.89 49.0 1 19761230 0.000 8 11160000 1978 54.7 1370 1 19780116 0.85 1 19771014 11160000 1979 22.7 291 1 19790221 1.10 7 11160000 1980 52.6 1260 1 19800113 1.10 2 11160000 1981 13.5 444 1 19810321 0.50 26 11160000 1982 91.4 4300 1 19820104 0.65 1 19811001 11160000 1983 169 3300 1 19830302 3.90 2 11160000 1984 34.1 929 1 19831225 1.10 1 19840930 11160000 1985 17.8 792 1 19850208 1.10 1 19850901 11160000 1986 89.1 3220 1 19860217 1.50 1 19851011 11160000 1987 10.5 946 1 19870213 0.70 1 19870909 11160000 1988 6.74 250 1 19880117 0.000 1 19880905