1974 0.267684 3.735754 9.0909% 1973 0.494998 2.020211 6.4509% 1972 0.494683 2.021499 4.7304% 1971 3.523694 0.283793 5.7132% 1970 2.876810 0.347607 5.5272% 1969 0.230808 4.332601 5.5714% 1968 0.377000 2.652518 5.0148% 1967 2.761539