9.0909% 1973 0.172398 5.800517 6.4509% 1972 1.768077 0.565586 4.7304% 1971 5.842231 0.171167 5.7132% 1970 0.243565 4.105674 5.5272% 1969 0.182411 5.482121 5.5714% 1968 2.564646 0.389917 5.0148%