Month	Hours
1939-01-01	42.6000
1939-02-01	43.5000
1939-03-01	44.5000
1939-04-01	42.6000
1939-05-01	43.1000
1939-06-01	44.6000
1939-07-01	42.5000
1939-08-01	44.5000
1939-09-01	43.9000
1939-10-01	45.0000
1939-11-01	44.6000
1939-12-01	42.8000
1940-01-01	44.3000
1940-02-01	43.7000
1940-03-01	43.8000
1940-04-01	44.7000
1940-05-01	44.0000
1940-06-01	43.9000
1940-07-01	44.3000
1940-08-01	45.1000
1940-09-01	43.7000
1940-10-01	46.0000
1940-11-01	44.2000
1940-12-01	43.5000
1941-01-01	45.0000
1941-02-01	45.7000
1941-03-01	45.5000
1941-04-01	45.5000
1941-05-01	45.6000
1941-06-01	45.9000
1941-07-01	45.8000
1941-08-01	45.9000
1941-09-01	45.9000
1941-10-01	47.3000
1941-11-01	45.1000
1941-12-01	45.9000
1942-01-01	46.5000
1942-02-01	46.9000
1942-03-01	46.6000
1942-04-01	47.1000
1942-05-01	45.6000
1942-06-01	47.2000
1942-07-01	46.7000
1942-08-01	46.9000
1942-09-01	47.1000
1942-10-01	48.3000
1942-11-01	46.6000
1942-12-01	47.6000
1943-01-01	47.1000
1943-02-01	48.4000
1943-03-01	48.9000
1943-04-01	48.7000
1943-05-01	47.7000
1943-06-01	49.1000
1943-07-01	48.9000
1943-08-01	49.2000
1943-09-01	49.4000
1943-10-01	49.3000
1943-11-01	49.4000
1943-12-01	48.6000
1944-01-01	48.3000
1944-02-01	49.7000
1944-03-01	49.7000
1944-04-01	48.2000
1944-05-01	48.6000
1944-06-01	49.3000
1944-07-01	48.1000
1944-08-01	49.9000
1944-09-01	49.0000
1944-10-01	49.4000
1944-11-01	49.0000
1944-12-01	48.1000
1945-01-01	49.6000
1945-02-01	49.5000
1945-03-01	49.8000
1945-04-01	49.1000
1945-05-01	49.1000
1945-06-01	49.8000
1945-07-01	48.6000
1945-08-01	48.7000
1945-09-01	46.7000
1945-10-01	48.1000
1945-11-01	47.1000
1945-12-01	46.1000
1946-01-01	46.4000
1946-02-01	46.3000
1946-03-01	46.4000
1946-04-01	45.9000
1946-05-01	43.7000
1946-06-01	45.8000
1946-07-01	46.5000
1946-08-01	47.4000
1946-09-01	45.4000
1946-10-01	47.4000
1946-11-01	46.0000
1946-12-01	44.9000
1947-01-01	46.7000
1947-02-01	47.0000
1947-03-01	46.5000
1947-04-01	46.7000
1947-05-01	45.9000
1947-06-01	46.2000
1947-07-01	46.0000
1947-08-01	46.2000
1947-09-01	46.3000
1947-10-01	47.5000
1947-11-01	45.6000
1947-12-01	46.5000
1948-01-01	46.7000
1948-02-01	46.5000
1948-03-01	46.9000
1948-04-01	45.4000
1948-05-01	45.1000
1948-06-01	47.0000
1948-07-01	46.3000
1948-08-01	46.4000
1948-09-01	46.1000
1948-10-01	46.3000
1948-11-01	45.8000
1948-12-01	45.7000
1949-01-01	45.3000
1949-02-01	46.1000
1949-03-01	45.7000
1949-04-01	46.2000
1949-05-01	44.6000
1949-06-01	45.9000
1949-07-01	44.3000
1949-08-01	46.6000
1949-09-01	39.7000
1949-10-01	38.5000
1949-11-01	40.1000
1949-12-01	40.0000
1950-01-01	39.9000
1950-02-01	39.9000
1950-03-01	41.7000
1950-04-01	40.0000
1950-05-01	40.3000
1950-06-01	42.0000
1950-07-01	39.4000
1950-08-01	42.7000
1950-09-01	40.6000
1950-10-01	41.8000
1950-11-01	41.5000
1950-12-01	40.0000
1951-01-01	42.2000
1951-02-01	41.2000
1951-03-01	41.9000
1951-04-01	40.7000
1951-05-01	41.1000
1951-06-01	41.1000
1951-07-01	40.2000
1951-08-01	42.2000
1951-09-01	39.1000
1951-10-01	42.1000
1951-11-01	41.0000
1951-12-01	39.6000
1952-01-01	41.7000
1952-02-01	41.3000
1952-03-01	40.2000
1952-04-01	41.4000
1952-05-01	39.9000
1952-06-01	39.7000
1952-07-01	39.9000
1952-08-01	40.1000
1952-09-01	41.0000
1952-10-01	41.9000
1952-11-01	39.1000
1952-12-01	40.8000
1953-01-01	39.9000
1953-02-01	40.5000
1953-03-01	40.7000
1953-04-01	41.3000
1953-05-01	39.8000
1953-06-01	41.8000
1953-07-01	42.1000
1953-08-01	40.3000
1953-09-01	40.6000
1953-10-01	40.9000
1953-11-01	39.4000
1953-12-01	40.2000
1954-01-01	38.7000
1954-02-01	40.4000
1954-03-01	41.4000
1954-04-01	41.1000
1954-05-01	39.2000
1954-06-01	41.8000
1954-07-01	40.2000
1954-08-01	41.2000
1954-09-01	41.4000
1954-10-01	40.4000
1954-11-01	41.7000
1954-12-01	42.3000
1955-01-01	40.4000
1955-02-01	42.1000
1955-03-01	42.0000
1955-04-01	41.2000
1955-05-01	41.3000
1955-06-01	42.6000
1955-07-01	41.4000
1955-08-01	43.1000
1955-09-01	42.6000
1955-10-01	41.2000
1955-11-01	42.6000
1955-12-01	41.9000
1956-01-01	41.3000
1956-02-01	42.4000
1956-03-01	41.8000
1956-04-01	41.0000
1956-05-01	42.3000
1956-06-01	41.6000
1956-07-01	40.6000
1956-08-01	42.5000
1956-09-01	40.7000