Quarter	Percentage
1961-10-01	38.4000
1962-01-01	36.8000
1962-04-01	36.0000
1962-07-01	34.6000
1962-10-01	37.0000
1963-01-01	35.0000
1963-04-01	34.5000
1963-07-01	33.8000
1963-10-01	35.4000
1964-01-01	34.0000
1964-04-01	33.7000
1964-07-01	32.6000
1964-10-01	32.6000
1965-01-01	30.7000
1965-04-01	29.4000
1965-07-01	28.4000
1965-10-01	29.1000
1966-01-01	27.9000
1966-04-01	26.9000
1966-07-01	25.5000
1966-10-01	26.0000
1967-01-01	24.5000
1967-04-01	23.6000
1967-07-01	23.5000
1967-10-01	24.6000
1968-01-01	24.4000
1968-04-01	23.8000
1968-07-01	23.4000
1968-10-01	23.9000
1969-01-01	22.9000