Quarter	Percent
1948-04-01	2.92000
1948-07-01	3.01000
1948-10-01	3.02000
1949-01-01	3.12000
1949-04-01	3.17000
1949-07-01	3.07000
1949-10-01	3.03000
1950-01-01	3.12000
1950-04-01	3.22000
1950-07-01	3.13000
1950-10-01	3.28000
1951-01-01	3.42000
1951-04-01	3.52000
1951-07-01	3.47000
1951-10-01	3.67000
1952-01-01	3.79000
1952-04-01	3.90000
1952-07-01	3.84000
1952-10-01	3.84000
1953-01-01	3.90000
1953-04-01	4.05000
1953-07-01	4.10000
1953-10-01	4.10000
1954-01-01	4.03000
1954-04-01	3.98000
1954-07-01	3.95000
1954-10-01	3.90000
1955-01-01	3.87000
1955-04-01	3.95000
1955-07-01	4.11000
1955-10-01	4.17000
1956-01-01	4.19000
1956-04-01	4.38000
1956-07-01	4.53000
1956-10-01	4.58000
1957-01-01	4.60000
1957-04-01	4.65000
1957-07-01	5.01000
1957-10-01	5.05000
1958-01-01	4.77000
1958-04-01	4.58000
1958-07-01	4.54000
1958-10-01	4.79000
1959-01-01	4.84000
1959-04-01	5.07000
1959-07-01	5.44000
1959-10-01	5.56000