Quarter	Per Cent Expanding
1948-07-01	37.0000
1949-01-01	33.0000
1949-04-01	40.0000
1949-07-01	54.0000
1949-10-01	62.0000
1950-01-01	78.0000
1950-04-01	81.0000
1950-07-01	82.0000
1950-10-01	69.0000
1951-01-01	57.0000
1951-04-01	50.0000
1951-07-01	38.0000
1951-10-01	45.0000
1952-01-01	48.0000
1952-07-01	60.0000
1952-10-01	64.0000
1953-01-01	56.0000
1953-04-01	54.0000
1953-07-01	49.0000
1953-10-01	52.0000
1954-01-01	52.0000
1954-04-01	62.0000
1954-07-01	71.0000
1954-10-01	74.0000
1955-01-01	76.0000
1955-04-01	78.0000
1955-07-01	72.0000
1955-10-01	70.0000
1956-01-01	69.0000
1956-04-01	66.0000
1956-07-01	59.0000
1956-10-01	58.0000
1957-04-01	46.0000
1957-07-01	38.0000
1957-10-01	42.0000
1958-01-01	51.0000
1958-04-01	60.0000
1958-07-01	74.0000
1958-10-01	78.0000