Month	Percent
1951-01-01	2.82000
1951-02-01	2.85000
1951-03-01	2.95000
1951-04-01	3.16000
1951-05-01	3.10000
1951-06-01	3.46000
1951-08-01	3.01000
1951-10-01	3.16000
1951-11-01	3.29000
1951-12-01	3.25000
1952-01-01	3.14000
1952-02-01	3.05000
1952-03-01	3.26000
1952-04-01	3.14000
1952-05-01	3.14000
1952-06-01	3.22000
1952-07-01	3.19000
1952-10-01	3.17000
1952-11-01	3.09000
1952-12-01	3.14000
1953-01-01	3.24000
1953-02-01	3.39000
1953-03-01	3.40000
1953-04-01	3.59000
1953-05-01	3.88000
1953-07-01	3.68000
1953-08-01	3.62000
1953-09-01	3.85000
1953-10-01	3.20000
1953-11-01	3.28000
1953-12-01	3.30000
1954-01-01	3.19000
1954-02-01	3.03000
1954-03-01	2.91000
1954-04-01	2.99000
1954-05-01	3.06000
1954-06-01	3.00000
1954-08-01	2.97000
1954-09-01	3.11000
1954-10-01	2.98000
1954-11-01	3.10000
1954-12-01	3.02000
1955-01-01	3.14000
1955-02-01	3.14000
1955-03-01	3.28000
1955-05-01	3.24000
1955-06-01	3.20000
1955-08-01	3.50000
1955-09-01	3.32000
1955-10-01	3.25000
1955-11-01	3.23000
1955-12-01	3.32000
1956-02-01	3.15000
1956-03-01	3.27000
1956-04-01	3.72000
1956-05-01	3.62000
1956-06-01	3.55000
1956-07-01	3.68000
1956-08-01	4.12000
1956-09-01	3.98000
1956-10-01	4.04000
1956-11-01	4.30000
1956-12-01	4.30000
1957-01-01	4.36000
1957-02-01	4.26000
1957-03-01	4.30000
1957-04-01	4.29000
1957-05-01	4.42000
1957-06-01	4.88000
1957-07-01	4.69000
1957-08-01	4.89000
1957-09-01	4.79000
1957-10-01	4.91000
1957-11-01	4.69000
1957-12-01	4.43000
1958-01-01	3.72000
1958-02-01	3.92000
1958-03-01	4.09000
1958-04-01	3.85000
1958-05-01	3.88000
1958-06-01	3.81000
1958-07-01	3.98000
1958-08-01	4.52000
1958-09-01	4.68000
1958-10-01	4.52000
1958-11-01	4.47000
1958-12-01	4.50000
1959-01-01	4.59000
1959-02-01	4.35000
1959-03-01	4.40000
1959-04-01	4.59000
1959-05-01	4.88000
1959-06-01	4.98000
1959-07-01	4.93000
1959-08-01	4.93000
1959-09-01	5.48000
1959-10-01	5.12000
1959-11-01	5.21000
1959-12-01	5.16000
1960-01-01	4.92000
1960-02-01	5.04000
1960-03-01	4.74000
1960-04-01	4.94000
1960-05-01	4.88000
1960-06-01	4.76000
1960-07-01	4.65000
1960-08-01	4.42000
1960-09-01	4.62000
1960-10-01	4.62000
1960-11-01	4.74000
1960-12-01	4.97000
1961-01-01	4.52000
1961-03-01	4.37000
1961-04-01	4.56000
1961-05-01	4.56000
1961-06-01	4.72000
1961-07-01	4.65000
1961-08-01	4.72000
1961-09-01	4.50000
1961-10-01	4.45000
1961-11-01	4.48000
1961-12-01	4.56000
1962-01-01	4.55000
1962-02-01	4.51000
1962-03-01	4.40000
1962-04-01	4.35000
1962-05-01	4.28000
1962-06-01	4.26000
1962-07-01	4.42000
1962-08-01	4.39000
1962-09-01	4.27000
1962-10-01	4.26000
1962-11-01	4.24000
1962-12-01	4.32000
1963-01-01	4.20000
1963-02-01	4.27000
1963-03-01	4.26000
1963-04-01	4.37000
1963-05-01	4.34000
1963-06-01	4.31000
1963-07-01	4.35000
1963-08-01	4.33000
1963-09-01	4.35000
1963-10-01	4.39000
1963-11-01	4.41000
1963-12-01	4.49000
1964-01-01	4.45000
1964-02-01	4.38000
1964-03-01	4.50000
1964-05-01	4.46000
1964-06-01	4.48000
1964-07-01	4.42000
1964-08-01	4.42000
1964-09-01	4.50000
1964-12-01	4.50000
1965-02-01	4.43000
1965-03-01	4.51000
1965-04-01	4.47000
1965-05-01	4.51000
1965-06-01	4.59000
1965-07-01	4.59000
1965-08-01	4.70000
1965-09-01	4.71000
1965-10-01	4.65000
1965-11-01	4.73000
1965-12-01	4.92000
1966-01-01	4.90000
1966-02-01	5.12000
1966-03-01	5.35000
1966-04-01	5.20000
1966-05-01	5.25000
1966-06-01	5.65000
1966-07-01	5.77000
1966-08-01	5.88000
1966-09-01	5.90000
1966-10-01	5.84000
1966-11-01	5.78000
1966-12-01	5.93000
1967-01-01	5.39000
1967-02-01	5.26000
1967-03-01	5.45000
1967-04-01	5.43000