Quarter	Percent
1956-01-01	5.60000
1956-04-01	5.40000
1956-07-01	5.80000
1956-10-01	5.30000
1957-01-01	4.80000
1957-04-01	4.90000
1957-07-01	5.20000
1957-10-01	5.30000
1958-01-01	5.70000
1958-04-01	6.00000
1958-07-01	5.80000
1958-10-01	6.00000
1959-01-01	6.10000
1959-04-01	6.70000
1959-07-01	6.60000
1959-10-01	6.40000
1960-01-01	7.20000
1960-04-01	7.30000
1960-07-01	7.60000
1960-10-01	7.60000
1961-01-01	8.00000
1961-04-01	8.10000
1961-07-01	7.90000
1961-10-01	7.70000
1962-01-01	7.70000
1962-04-01	7.40000
1962-07-01	7.30000
1962-10-01	7.40000
1963-01-01	7.20000
1963-04-01	7.50000
1963-07-01	7.60000
1963-10-01	7.50000
1964-01-01	7.30000
1964-04-01	7.40000
1964-07-01	7.70000
1964-10-01	7.50000
1965-01-01	7.70000
1965-04-01	7.50000
1965-07-01	7.20000
1965-10-01	7.70000
1966-01-01	7.50000
1966-04-01	6.80000
1966-07-01	6.80000
1966-10-01	7.00000
1967-01-01	6.60000
1967-04-01	6.30000