Quarter	Per Cent Expanding
1953-07-01	50.0000
1953-10-01	48.0000
1954-01-01	46.0000
1954-04-01	52.0000
1954-07-01	60.0000
1954-10-01	64.0000
1955-01-01	66.0000
1955-04-01	70.0000
1955-07-01	65.0000
1955-10-01	57.0000
1956-01-01	53.0000
1956-04-01	48.0000
1956-07-01	49.0000
1956-10-01	44.0000
1957-01-01	42.0000
1957-04-01	41.0000
1957-07-01	33.0000
1957-10-01	36.0000
1958-01-01	48.0000
1958-04-01	54.0000
1958-07-01	65.0000
1958-10-01	70.0000