Quarter	Percent
1948-04-01	2.49000
1948-07-01	2.60000
1948-10-01	2.68000
1949-01-01	2.68000
1949-04-01	2.86000
1949-07-01	2.64000
1949-10-01	2.67000
1950-01-01	2.55000
1950-04-01	2.67000
1950-07-01	2.63000
1950-10-01	2.87000
1951-01-01	3.02000
1951-04-01	3.04000
1951-07-01	3.06000
1951-10-01	3.23000
1952-01-01	3.47000
1952-04-01	3.46000
1952-07-01	3.44000
1952-10-01	3.49000
1953-01-01	3.50000
1953-04-01	3.71000
1953-07-01	3.71000
1953-10-01	3.79000
1954-01-01	3.74000
1954-04-01	3.61000
1954-07-01	3.57000
1954-10-01	3.55000
1955-01-01	3.55000
1955-04-01	3.55000
1955-07-01	3.76000
1955-10-01	3.95000
1956-01-01	3.93000
1956-04-01	4.15000
1956-07-01	4.39000
1956-10-01	4.40000
1957-01-01	4.40000
1957-04-01	4.39000
1957-07-01	4.85000
1957-10-01	4.86000
1958-01-01	4.49000
1958-04-01	4.17000
1958-07-01	4.21000
1958-10-01	4.50000
1959-01-01	4.49000
1959-04-01	4.90000
1959-07-01	5.27000
1959-10-01	5.39000