Month	Percent
1948-01-01	2.36000
1948-02-01	2.47000
1948-03-01	2.45000
1948-04-01	2.37000
1948-05-01	2.31000
1948-06-01	2.24000
1948-07-01	2.27000
1948-08-01	2.37000
1948-09-01	2.41000
1948-10-01	2.42000
1948-11-01	2.38000
1948-12-01	2.26000
1949-01-01	2.16000
1949-02-01	2.20000
1949-03-01	2.18000
1949-04-01	2.14000
1949-05-01	2.14000
1949-06-01	2.20000
1949-07-01	2.16000
1949-08-01	2.12000
1949-09-01	2.14000
1949-10-01	2.16000
1949-11-01	2.12000
1949-12-01	2.09000
1950-01-01	2.06000
1950-02-01	2.03000
1950-03-01	2.01000
1950-04-01	2.03000
1950-05-01	2.00000
1950-06-01	1.99000
1950-07-01	2.01000
1950-08-01	1.83000
1950-09-01	1.84000
1950-10-01	1.79000
1950-11-01	1.74000
1950-12-01	1.72000
1951-01-01	1.61000
1951-02-01	1.58000
1951-03-01	1.74000
1951-04-01	1.94000
1951-05-01	2.00000
1951-06-01	2.19000
1951-07-01	2.15000
1951-08-01	2.02000
1951-09-01	2.01000
1951-10-01	2.06000
1951-11-01	2.05000
1951-12-01	2.09000
1952-01-01	2.09000
1952-02-01	2.07000
1952-03-01	2.08000
1952-04-01	2.04000
1952-05-01	2.06000
1952-06-01	2.13000
1952-07-01	2.15000
1952-08-01	2.24000
1952-09-01	2.30000
1952-10-01	2.38000
1952-11-01	2.38000
1952-12-01	2.38000
1953-01-01	2.43000
1953-02-01	2.55000
1953-03-01	2.65000
1953-04-01	2.65000
1953-05-01	2.78000
1953-06-01	2.99000
1953-07-01	2.98000
1953-08-01	2.90000
1953-09-01	2.90000
1953-10-01	2.75000
1953-11-01	2.62000
1953-12-01	2.60000
1954-01-01	2.50000
1954-02-01	2.42000
1954-03-01	2.40000
1954-04-01	2.47000
1954-05-01	2.50000
1954-06-01	2.48000
1954-07-01	2.32000
1954-08-01	2.26000
1954-09-01	2.31000
1954-10-01	2.34000
1954-11-01	2.32000
1954-12-01	2.36000
1955-01-01	2.40000
1955-02-01	2.44000
1955-03-01	2.44000
1955-04-01	2.41000
1955-05-01	2.38000
1955-06-01	2.41000
1955-07-01	2.54000
1955-08-01	2.60000
1955-09-01	2.58000
1955-10-01	2.51000
1955-11-01	2.46000
1955-12-01	2.57000
1956-01-01	2.50000
1956-02-01	2.44000
1956-03-01	2.57000
1956-04-01	2.70000
1956-05-01	2.68000
1956-06-01	2.54000
1956-07-01	2.65000
1956-08-01	2.80000
1956-09-01	2.94000
1956-10-01	2.95000
1956-11-01	3.16000
1956-12-01	3.22000
1957-01-01	3.18000
1957-02-01	3.00000
1957-03-01	3.10000
1957-04-01	3.13000
1957-05-01	3.27000
1957-06-01	3.41000
1957-07-01	3.40000
1957-08-01	3.54000
1957-09-01	3.54000
1957-10-01	3.42000
1957-11-01	3.37000
1957-12-01	3.04000
1958-01-01	2.91000
1958-02-01	3.02000
1958-03-01	3.06000
1958-04-01	2.96000
1958-05-01	2.92000
1958-06-01	2.97000
1958-07-01	3.09000
1958-08-01	3.36000
1958-09-01	3.54000
1958-10-01	3.45000
1958-11-01	3.32000
1958-12-01	3.34000
1959-01-01	3.42000
1959-02-01	3.36000
1959-03-01	3.30000
1959-04-01	3.39000
1959-05-01	3.58000
1959-06-01	3.72000
1959-07-01	3.71000
1959-08-01	3.58000
1959-09-01	3.78000
1959-10-01	3.62000
1959-11-01	3.55000
1959-12-01	3.68000
1960-01-01	3.72000
1960-02-01	3.60000
1960-03-01	3.56000
1960-04-01	3.56000
1960-05-01	3.60000
1960-06-01	3.55000
1960-07-01	3.50000
1960-08-01	3.34000
1960-09-01	3.42000
1960-10-01	3.53000
1960-11-01	3.40000
1960-12-01	3.40000
1961-01-01	3.40000
1961-02-01	3.31000
1961-03-01	3.45000
1961-04-01	3.50000
1961-05-01	3.43000
1961-06-01	3.52000
1961-07-01	3.52000
1961-08-01	3.52000
1961-09-01	3.53000
1961-10-01	3.42000
1961-11-01	3.41000
1961-12-01	3.47000
1962-01-01	3.34000
1962-02-01	3.21000
1962-03-01	3.14000
1962-04-01	3.06000
1962-05-01	3.11000
1962-06-01	3.26000
1962-07-01	3.28000
1962-08-01	3.23000
1962-09-01	3.11000
1962-10-01	3.02000
1962-11-01	3.04000
1962-12-01	3.07000
1963-01-01	3.10000
1963-02-01	3.15000
1963-03-01	3.05000
1963-04-01	3.10000
1963-05-01	3.11000
1963-06-01	3.21000
1963-07-01	3.22000
1963-08-01	3.13000
1963-09-01	3.20000
1963-10-01	3.20000
1963-11-01	3.30000
1963-12-01	3.27000
1964-01-01	3.22000
1964-02-01	3.14000
1964-03-01	3.28000
1964-04-01	3.28000
1964-05-01	3.20000
1964-06-01	3.20000
1964-07-01	3.18000
1964-08-01	3.19000
1964-09-01	3.23000
1964-10-01	3.25000
1964-11-01	3.18000
1964-12-01	3.13000
1965-01-01	3.06000
1965-02-01	3.09000
1965-03-01	3.18000
1965-04-01	3.15000
1965-05-01	3.17000
1965-06-01	3.24000
1965-07-01	3.27000
1965-08-01	3.24000
1965-09-01	3.35000
1965-10-01	3.40000
1965-11-01	3.46000
1965-12-01	3.54000
1966-01-01	3.52000
1966-02-01	3.64000
1966-03-01	3.72000
1966-04-01	3.56000
1966-05-01	3.65000
1966-06-01	3.77000
1966-07-01	3.95000
1966-08-01	4.12000
1966-09-01	4.12000
1966-10-01	3.94000
1966-11-01	3.86000
1966-12-01	3.86000
1967-01-01	3.54000