1. (24) 1961 142 (II .) 113 (13) 1962 118 (34) 36 (12) 1963 139 (11) Ill (2) 1964 95 (lO) 12 (0) 1965 71 (2) 7 (0) 1966 77 4 1967 so l 1968 so . 1969 71 14
2. Table I shows that missile fail : t » still occur with surprising frequency. In 1969 :a,Ayoccurred