13200500 1951 10.6 64.0 1 19510407 0.40 7 13200500 1952 15.7 110 1 19520407 1.00 24 13200500 1953 8.37 87.0 1 19530118 0.70 2 13200500 1954 5.34 34.0 1 19540310 0.40 11 13200500 1955 4.10 42.0 1 19550422 0.10 12 13200500 1956 11.1 98.0 1 19551223 0.80 4 13200500 1957 10.6 68.0 1 19570406 0.70 7 13200500 1958 13.7 85.0 1 19580418 0.70 14 13200500 1959 5.09 24.0 4 0.10 8 13200500 1960 7.46 62.0 1 19600407 0.40 15 13200500 1961 3.03 16.0 2 0.000 7 13200500 1962 5.53 30.0 1 19620407 0.30 1 19620918 13200500 1963 4.12 25.0 1 19630203 0.10 3 13200500 1964 5.71 34.0 1 19640401 0.30 7 13200500 1965 16.6 204 1 19650129 0.90 6 13200500 1966 3.67 18.0 2 0.020 1 19660825 13200500 1967 4.36 24.0 1 19670122 0.030 3 13200500 1968 3.33 43.0 1 19680221 0.000 5 13200500 1969 9.20 66.0 1 19690406 0.21 2 13200500 1970 8.11 61.0 1 19700122 0.30 1 19700830 13200500 1971 17.3 92.0 1 19710331 0.77 1 19710816