Quarter	Percentage
1946-01-01	96.9000
1946-04-01	95.7000
1946-07-01	88.7000
1946-10-01	78.0000
1947-01-01	71.7000
1947-04-01	71.1000
1947-07-01	67.7000
1947-10-01	64.3000
1948-01-01	63.4000
1948-04-01	63.8000
1948-07-01	61.2000
1948-10-01	61.2000
1949-01-01	63.2000
1949-04-01	68.8000
1949-07-01	70.6000
1949-10-01	72.1000
1950-01-01	72.8000
1950-04-01	73.2000
1950-07-01	69.2000
1950-10-01	62.6000
1951-01-01	58.3000
1951-04-01	58.2000
1951-07-01	56.2000
1951-10-01	55.4000
1952-01-01	52.8000
1952-04-01	55.2000
1952-07-01	53.1000
1952-10-01	52.6000
1953-01-01	51.0000
1953-04-01	51.8000
1953-07-01	51.6000
1953-10-01	53.5000
1954-01-01	51.5000
1954-04-01	51.7000
1954-07-01	52.3000
1954-10-01	52.8000
1955-01-01	50.9000
1955-04-01	50.4000
1955-07-01	48.3000
1955-10-01	48.0000
1956-01-01	44.3000
1956-04-01	42.2000
1956-07-01	40.5000
1956-10-01	41.3000
1957-01-01	39.6000
1957-04-01	38.8000
1957-07-01	38.5000
1957-10-01	40.2000
1958-01-01	39.2000
1958-04-01	39.2000
1958-07-01	39.0000
1958-10-01	41.1000
1959-01-01	39.4000
1959-04-01	39.0000
1959-07-01	38.6000
1959-10-01	38.6000
1960-01-01	36.2000
1960-04-01	35.4000
1960-07-01	34.6000
1960-10-01	35.7000
1961-01-01	35.1000
1961-04-01	35.9000
1961-07-01	34.9000
1961-10-01	35.7000