6.6558% 1976 0.671275 1.489701 6.4073% 1975 1.754436 0.569984 9.8159% 1974 7.297168 0.137039 9.0909% 1973 7.388400 0.135347 6.4509% 1972 6.199691 0.161298 4.7304% 1971 1.268581 0.788283 5.7132% 1970 1.169933 0.854750 5.5272%