Quarter	Percent
1948-04-01	2.12000
1948-07-01	2.32000
1948-10-01	2.34000
1949-01-01	2.42000
1949-04-01	2.35000
1949-07-01	2.32000
1949-10-01	2.38000
1950-01-01	2.29000
1950-04-01	2.34000
1950-07-01	2.32000
1950-10-01	2.51000
1951-01-01	2.74000
1951-04-01	2.78000
1951-07-01	2.79000
1951-10-01	3.01000
1952-01-01	3.23000
1952-04-01	3.27000
1952-07-01	3.29000
1952-10-01	3.33000
1953-01-01	3.31000
1953-04-01	3.52000
1953-07-01	3.52000
1953-10-01	3.51000
1954-01-01	3.50000
1954-04-01	3.34000
1954-07-01	3.29000
1954-10-01	3.30000
1955-01-01	3.29000
1955-04-01	3.30000
1955-07-01	3.54000
1955-10-01	3.76000
1956-01-01	3.75000
1956-04-01	3.97000
1956-07-01	4.20000
1956-10-01	4.22000
1957-01-01	4.23000
1957-04-01	4.23000
1957-07-01	4.69000
1957-10-01	4.71000
1958-01-01	4.29000
1958-04-01	3.88000
1958-07-01	4.00000
1958-10-01	4.29000
1959-01-01	4.29000
1959-04-01	4.71000
1959-07-01	5.15000
1959-10-01	5.19000