Quarter	Percentage
1947-01-01	39.6000
1947-04-01	39.0000
1947-07-01	38.5000
1947-10-01	37.1000
1948-01-01	37.8000
1948-04-01	37.3000
1948-07-01	37.1000
1948-10-01	35.8000
1949-01-01	36.6000
1949-04-01	37.0000
1949-07-01	37.6000
1949-10-01	37.2000
1950-01-01	37.6000
1950-04-01	37.8000
1950-07-01	37.5000
1950-10-01	35.5000
1951-01-01	35.2000
1951-04-01	34.9000
1951-07-01	34.4000
1951-10-01	33.0000
1952-01-01	33.4000
1952-04-01	33.8000
1952-07-01	33.4000
1952-10-01	32.9000
1953-01-01	33.3000
1953-04-01	33.3000
1953-07-01	33.1000
1953-10-01	32.6000
1954-01-01	33.3000
1954-04-01	34.0000
1954-07-01	33.8000
1954-10-01	33.0000
1955-01-01	33.7000
1955-04-01	34.3000
1955-07-01	34.0000
1955-10-01	33.2000
1956-01-01	33.7000
1956-04-01	33.7000
1956-07-01	32.9000
1956-10-01	32.1000
1957-01-01	32.2000
1957-04-01	32.2000
1957-07-01	31.9000
1957-10-01	31.7000
1958-01-01	31.9000
1958-04-01	32.1000
1958-07-01	32.4000
1958-10-01	32.7000
1959-01-01	32.7000
1959-04-01	32.6000
1959-07-01	32.6000
1959-10-01	32.2000
1960-01-01	32.1000
1960-04-01	31.9000
1960-07-01	31.8000
1960-10-01	31.5000
1961-01-01	31.6000
1961-04-01	31.8000
1961-07-01	31.7000
1961-10-01	31.4000
1962-01-01	31.4000
1962-04-01	31.3000
1962-07-01	31.2000
1962-10-01	31.5000
1963-01-01	31.6000
1963-04-01	31.7000
1963-07-01	31.9000
1963-10-01	31.9000
1964-01-01	32.1000
1964-04-01	31.7000
1964-07-01	31.5000
1964-10-01	31.0000
1965-01-01	30.9000
1965-04-01	30.6000
1965-07-01	30.5000
1965-10-01	29.6000
1966-01-01	29.5000
1966-04-01	29.5000
1966-07-01	29.1000
1966-10-01	28.3000
1967-01-01	28.2000
1967-04-01	28.3000
1967-07-01	28.3000
1967-10-01	28.1000
1968-01-01	28.1000
1968-04-01	27.9000
1968-07-01	27.7000
1968-10-01	27.3000
1969-01-01	27.0000