Month	Hours
1932-01-01	42.0000
1932-02-01	43.0000
1932-03-01	42.7000
1932-04-01	41.3000
1932-05-01	40.8000
1932-06-01	40.3000
1932-07-01	39.8000
1932-08-01	40.7000
1932-09-01	43.5000
1932-10-01	43.7000
1932-11-01	42.3000
1932-12-01	42.1000
1933-01-01	41.3000
1933-02-01	42.0000
1933-03-01	40.3000
1933-04-01	41.3000
1933-05-01	43.3000
1933-06-01	44.9000
1933-07-01	44.4000
1933-08-01	38.7000
1933-09-01	37.0000
1933-10-01	36.3000
1933-11-01	35.0000
1933-12-01	34.9000
1934-01-01	34.5000
1934-02-01	36.2000
1934-03-01	36.2000
1934-04-01	35.9000
1934-05-01	35.4000
1934-06-01	34.5000
1934-07-01	34.1000
1934-08-01	34.6000
1934-09-01	34.6000
1934-10-01	34.9000
1934-11-01	34.5000
1934-12-01	35.5000
1935-01-01	35.4000
1935-02-01	36.0000
1935-03-01	36.1000
1935-04-01	35.5000
1935-05-01	35.1000
1935-06-01	35.0000
1935-07-01	35.5000
1935-08-01	36.4000
1935-09-01	37.0000
1935-10-01	37.2000
1935-11-01	36.4000
1935-12-01	37.5000
1936-01-01	36.8000
1936-02-01	37.0000
1936-03-01	37.5000
1936-04-01	36.8000
1936-05-01	37.1000
1936-06-01	37.2000
1936-07-01	37.3000
1936-08-01	38.5000
1936-09-01	37.5000
1936-10-01	38.7000
1936-11-01	38.5000
1936-12-01	39.5000
1937-01-01	38.7000
1937-02-01	39.3000
1937-03-01	39.6000
1937-04-01	38.7000
1937-05-01	38.2000
1937-06-01	37.7000
1937-07-01	37.3000
1937-08-01	37.3000
1937-09-01	36.3000
1937-10-01	36.2000
1937-11-01	34.7000
1937-12-01	34.7000
1938-01-01	34.3000
1938-02-01	35.5000
1938-03-01	35.6000
1938-04-01	35.0000
1938-05-01	35.1000
1938-06-01	35.0000
1938-07-01	36.1000
1938-08-01	37.0000
1938-09-01	37.6000
1938-10-01	37.6000
1938-11-01	36.5000
1938-12-01	37.5000
1939-01-01	37.0000
1939-02-01	37.5000
1939-03-01	37.8000
1939-04-01	36.7000
1939-05-01	36.8000
1939-06-01	37.3000
1939-07-01	37.1000
1939-08-01	37.8000
1939-09-01	37.7000
1939-10-01	38.2000
1939-11-01	37.7000
1939-12-01	37.7000
1940-01-01	36.8000
1940-02-01	36.8000
1940-03-01	37.0000
1940-04-01	36.3000
1940-05-01	36.4000
1940-06-01	36.4000
1940-07-01	36.6000
1940-08-01	37.2000
1940-09-01	37.6000
1940-10-01	37.6000
1940-11-01	37.0000
1940-12-01	38.3000
1941-01-01	37.3000
1941-02-01	38.4000
1941-03-01	38.9000
1941-04-01	38.5000
1941-05-01	39.0000
1941-06-01	39.4000
1941-07-01	39.0000
1941-08-01	39.5000
1941-09-01	39.6000
1941-10-01	39.2000
1941-11-01	38.7000
1941-12-01	39.6000
1942-01-01	39.2000
1942-02-01	39.9000
1942-03-01	40.1000
1942-04-01	40.0000
1942-05-01	40.1000
1942-06-01	39.9000
1942-07-01	39.8000
1942-08-01	40.2000
1942-09-01	39.7000
1942-10-01	40.8000
1942-11-01	41.3000
1942-12-01	42.1000
1943-01-01	41.8000
1943-02-01	42.0000
1943-03-01	42.3000
1943-04-01	42.5000
1943-05-01	42.8000
1943-06-01	42.7000
1943-07-01	42.2000
1943-08-01	42.6000
1943-09-01	42.2000
1943-10-01	42.7000
1943-11-01	43.1000
1943-12-01	42.8000
1944-01-01	43.0000
1944-02-01	43.2000
1944-03-01	43.2000
1944-04-01	42.5000
1944-05-01	43.2000
1944-06-01	43.3000
1944-07-01	43.0000
1944-08-01	43.0000
1944-09-01	43.0000
1944-10-01	43.3000
1944-11-01	43.2000
1944-12-01	43.5000
1945-01-01	43.4000
1945-02-01	43.4000
1945-03-01	43.5000
1945-04-01	43.2000
1945-05-01	42.3000
1945-06-01	43.1000
1945-07-01	42.8000
1945-08-01	40.3000
1945-09-01	41.8000
1945-10-01	41.5000
1945-11-01	41.3000
1945-12-01	41.5000
1946-01-01	41.2000
1946-02-01	40.9000
1946-03-01	40.9000
1946-04-01	40.6000
1946-05-01	40.1000
1946-06-01	40.2000
1946-07-01	40.1000
1946-08-01	40.4000
1946-09-01	40.3000
1946-10-01	40.2000
1946-11-01	40.3000
1946-12-01	41.1000
1947-01-01	40.6000
1947-02-01	40.4000
1947-03-01	40.1000
1947-04-01	39.7000
1947-05-01	39.8000
1947-06-01	39.9000
1947-07-01	39.9000
1947-08-01	39.9000
1947-09-01	40.4000
1947-10-01	40.4000
1947-11-01	40.3000
1947-12-01	40.9000
1948-01-01	40.2000
1948-02-01	39.9000
1948-03-01	39.9000
1948-04-01	39.7000
1948-05-01	39.7000
1948-06-01	39.8000
1948-07-01	39.7000
1948-08-01	39.6000
1948-09-01	39.7000
1948-10-01	39.2000
1948-11-01	39.2000
1948-12-01	39.4000
1949-01-01	38.7000
1949-02-01	38.8000
1949-03-01	38.6000
1949-04-01	37.7000
1949-05-01	38.1000
1949-06-01	38.5000
1949-07-01	38.8000
1949-08-01	39.0000
1949-09-01	39.6000
1949-10-01	39.6000
1949-11-01	39.3000
1949-12-01	39.6000
1950-01-01	39.4000
1950-02-01	39.3000
1950-03-01	39.2000
1950-04-01	38.6000
1950-05-01	38.9000
1950-06-01	39.5000
1950-07-01	39.9000
1950-08-01	40.5000
1950-09-01	40.2000
1950-10-01	40.3000
1950-11-01	40.3000
1950-12-01	40.5000
1951-01-01	40.2000
1951-02-01	40.0000
1951-03-01	40.0000
1951-04-01	39.6000
1951-05-01	39.3000
1951-06-01	39.4000
1951-07-01	39.4000
1951-08-01	39.2000
1951-09-01	39.5000
1951-10-01	39.0000
1951-11-01	39.2000
1951-12-01	39.8000
1952-01-01	39.4000
1952-02-01	39.4000
1952-03-01	39.3000
1952-04-01	38.5000
1952-05-01	39.0000
1952-06-01	39.6000
1952-07-01	39.5000
1952-08-01	40.0000
1952-09-01	40.4000
1952-10-01	40.3000
1952-11-01	40.2000
1952-12-01	40.6000
1953-01-01	39.8000
1953-02-01	39.8000
1953-03-01	40.0000
1953-04-01	39.5000
1953-05-01	39.6000
1953-06-01	39.7000
1953-07-01	39.7000
1953-08-01	39.6000
1953-09-01	39.1000
1953-10-01	39.3000
1953-11-01	39.2000
1953-12-01	39.3000
1954-01-01	38.6000
1954-02-01	38.8000
1954-03-01	38.8000
1954-04-01	38.1000
1954-05-01	38.6000
1954-06-01	39.0000
1954-07-01	39.1000
1954-08-01	39.3000
1954-09-01	39.4000
1954-10-01	39.3000
1954-11-01	39.5000
1954-12-01	39.8000
1955-01-01	39.4000
1955-02-01	39.5000
1955-03-01	39.7000
1955-04-01	39.0000
1955-05-01	39.6000
1955-06-01	40.0000
1955-07-01	39.8000
1955-08-01	40.0000
1955-09-01	40.2000
1955-10-01	40.4000
1955-11-01	40.3000
1955-12-01	40.5000
1956-01-01	39.9000
1956-02-01	39.8000
1956-03-01	39.5000
1956-04-01	39.2000
1956-05-01	39.1000
1956-06-01	39.3000
1956-07-01	39.4000
1956-08-01	39.6000
1956-09-01	39.8000
1956-10-01	39.8000
1956-11-01	39.6000
1956-12-01	39.8000
1957-01-01	39.2000
1957-02-01	39.3000
1957-03-01	39.1000
1957-04-01	38.9000
1957-05-01	38.9000
1957-06-01	39.3000
1957-07-01	39.5000
1957-08-01	39.6000
1957-09-01	39.7000
1957-10-01	39.1000
1957-11-01	38.8000
1957-12-01	39.0000
1958-01-01	38.4000
1958-02-01	38.2000
1958-03-01	38.1000
1958-04-01	37.8000
1958-05-01	38.2000
1958-06-01	38.7000
1958-07-01	39.0000
1958-08-01	39.4000
1958-09-01	39.5000
1958-10-01	39.4000
1958-11-01	39.4000
1958-12-01	39.6000
1959-01-01	39.4000
1959-02-01	39.4000
1959-03-01	39.5000
1959-04-01	39.5000
1959-05-01	39.7000
1959-06-01	39.9000
1959-07-01	39.9000
1959-08-01	40.1000
1959-09-01	39.8000
1959-10-01	39.6000
1959-11-01	39.7000
1959-12-01	39.9000
1960-01-01	39.4000
1960-02-01	39.1000
1960-03-01	38.9000
1960-04-01	38.7000
1960-05-01	39.4000
1960-06-01	39.6000
1960-07-01	39.7000
1960-08-01	39.6000
1960-09-01	39.2000
1960-10-01	39.1000
1960-11-01	38.9000
1960-12-01	38.2000
1961-01-01	38.5000
1961-02-01	38.5000
1961-03-01	38.7000
1961-04-01	38.7000
1961-05-01	39.0000
1961-06-01	39.6000
1961-07-01	39.7000
1961-08-01	39.8000
1961-09-01	39.5000
1961-10-01	39.8000
1961-11-01	39.9000
1961-12-01	39.8000
1962-01-01	39.0000
1962-02-01	39.2000