1972 1.945589 0.513983 4.7304% 1971 3.860979 0.259002 5.7132% 1970 3.684166 0.271432 5.5272% 1969 0.292046 3.424118 5.5714% 1968 5.164529 0.193628 5.0148% 1967 2.039740 0.490259 2.5719% 1966 1.286752 0.777151 3.5485% 1965 4.828743 0.207093 2.7360% 1964 4.218151 0.237071 1.5423% 1963 2.204121 0.453696 1.5697% 1962 4.369932 0.228837 2.2421% 1961 2.713138 0.368577 0.9709% 1960 3.911433 0.255661 1.6442% 1959 2.714398 0.368406 2.3579% 1958 0.550001 1.818178 2.0623% 1957 4.098509 0.243991 3.5571% 1956 0.176254
ensuring