Month	Hours
1921-07-01	193.900
1921-08-01	205.600
1921-09-01	195.500
1921-10-01	204.300
1921-11-01	193.800
1921-12-01	195.600
1922-01-01	194.000
1922-02-01	180.600
1922-03-01	206.600
1922-04-01	192.400
1922-05-01	201.800
1922-06-01	200.400
1922-07-01	200.600
1922-08-01	212.600
1922-09-01	202.200
1922-10-01	208.700
1922-11-01	200.300
1922-12-01	200.700
1923-01-01	207.000
1923-02-01	184.900
1923-03-01	211.400
1923-04-01	199.900
1923-05-01	206.800
1923-06-01	202.300
1923-07-01	199.900
1923-08-01	207.600
1923-09-01	192.500
1923-10-01	211.000
1923-11-01	194.800
1923-12-01	193.200
1924-01-01	202.800
1924-02-01	190.100
1924-03-01	204.100
1924-04-01	199.700
1924-05-01	202.000
1924-06-01	193.400
1924-07-01	200.000
1924-08-01	199.900
1924-09-01	197.200
1924-10-01	210.600
1924-11-01	191.900
1924-12-01	201.600
1925-01-01	204.000
1925-02-01	184.200
1925-03-01	204.400
1925-04-01	200.500
1925-05-01	199.000
1925-06-01	201.200
1925-07-01	203.300
1925-08-01	202.400
1925-09-01	197.400
1925-10-01	209.000
1925-11-01	193.500
1925-12-01	201.900
1926-01-01	198.300
1926-02-01	184.000
1926-03-01	209.900
1926-04-01	201.000
1926-05-01	199.900
1926-06-01	201.600
1926-07-01	202.200
1926-08-01	203.700
1926-09-01	197.400
1926-10-01	204.500
1926-11-01	197.600
1926-12-01	202.600
1927-01-01	199.600
1927-02-01	182.900
1927-03-01	209.500
1927-04-01	200.900
1927-05-01	200.200
1927-06-01	201.500
1927-07-01	196.300
1927-08-01	207.500
1927-09-01	196.600
1927-10-01	204.100
1927-11-01	195.400
1927-12-01	198.600
1928-01-01	198.700
1928-02-01	189.700
1928-03-01	208.000
1928-04-01	196.100
1928-05-01	204.300
1928-06-01	199.500
1928-07-01	197.500
1928-08-01	207.500
1928-09-01	192.100
1928-10-01	210.900
1928-11-01	196.600
1928-12-01	194.800
1929-01-01	204.000
1929-02-01	183.900
1929-03-01	204.500
1929-04-01	202.900
1929-05-01	205.200
1929-06-01	197.000
1929-07-01	204.100
1929-08-01	207.500
1929-09-01	192.800
1929-10-01	209.900
1929-11-01	194.900
1929-12-01	194.900
1930-01-01	201.500
1930-02-01	182.200
1930-03-01	201.000
1930-04-01	199.200
1930-05-01	199.100
1930-06-01	191.400
1930-07-01	195.100
1930-08-01	194.300
1930-09-01	189.000
1930-10-01	200.700
1930-11-01	182.400
1930-12-01	189.800
1931-01-01	190.900
1931-02-01	172.500
1931-03-01	192.200
1931-04-01	190.300
1931-05-01	187.700
1931-06-01	188.500
1931-07-01	189.000
1931-08-01	185.500
1931-09-01	180.700
1931-10-01	188.400
1931-11-01	172.200
1931-12-01	178.700
1932-01-01	175.400
1932-02-01	171.000
1932-03-01	186.800
1932-04-01	178.600
1932-05-01	177.000
1932-06-01	176.600
1932-07-01	170.000
1932-08-01	178.200
1932-09-01	169.800
1932-10-01	176.400
1932-11-01	170.300
1932-12-01	172.200
1933-01-01	172.400
1933-02-01	157.400
1933-03-01	175.500
1933-04-01	167.300
1933-05-01	177.900
1933-06-01	177.600
1933-07-01	177.900
1933-08-01	186.600
1933-09-01	176.100
1933-10-01	183.900
1933-11-01	173.700
1933-12-01	173.700
1934-01-01	181.300
1934-02-01	165.400
1934-03-01	188.000
1934-04-01	177.600
1934-05-01	185.800
1934-06-01	183.100
1934-07-01	180.400
1934-08-01	187.900
1934-09-01	174.500
1934-10-01	190.300
1934-11-01	177.000
1934-12-01	177.900
1935-01-01	188.100
1935-02-01	168.700
1935-03-01	185.300
1935-04-01	183.000
1935-05-01	186.200
1935-06-01	178.700
1935-07-01	184.400
1935-08-01	188.100
1935-09-01	177.000
1935-10-01	194.600
1935-11-01	180.400
1935-12-01	183.500
1936-01-01	193.000
1936-02-01	182.100
1936-03-01	193.200
1936-04-01	189.700
1936-05-01	187.300
1936-06-01	189.500
1936-07-01	193.400
1936-08-01	191.400
1936-09-01	188.500
1936-10-01	200.100
1936-11-01	184.200
1936-12-01	195.100
1937-01-01	189.500
1937-02-01	176.000
1937-03-01	202.200
1937-04-01	194.000
1937-05-01	192.000
1937-06-01	194.000
1937-07-01	194.500
1937-08-01	193.400
1937-09-01	188.300
1937-10-01	193.900
1937-11-01	184.500
1937-12-01	188.900
1938-01-01	185.500
1938-02-01	171.100
1938-03-01	195.900
1938-04-01	186.100
1938-05-01	186.300
1938-06-01	189.000
1938-07-01	186.200
1938-08-01	197.300
1938-09-01	187.900
1938-10-01	195.300
1938-11-01	187.600
1938-12-01	192.500
1939-01-01	191.100
1939-02-01	174.800
1939-03-01	200.100
1939-04-01	185.500
1939-05-01	195.600
1939-06-01	193.600
1939-07-01	189.000
1939-08-01	199.500
1939-09-01	190.800
1939-10-01	200.200
1939-11-01	190.900
1939-12-01	189.300
1940-01-01	197.900
1940-02-01	181.100
1940-03-01	193.900
1940-04-01	193.500
1940-05-01	195.900
1940-06-01	188.800
1940-07-01	196.900
1940-08-01	200.800
1940-09-01	187.000
1940-10-01	203.700
1940-11-01	190.300
1940-12-01	193.500
1941-01-01	200.000
1941-02-01	180.400
1941-03-01	200.900
1941-04-01	197.200
1941-05-01	202.200
1941-06-01	197.400
1941-07-01	203.100
1941-08-01	202.500
1941-09-01	196.900
1941-10-01	208.900
1941-11-01	191.200
1941-12-01	202.100
1942-01-01	203.900
1942-02-01	183.800
1942-03-01	205.200
1942-04-01	200.400
1942-05-01	198.700
1942-06-01	199.900
1942-07-01	200.900
1942-08-01	203.600
1942-09-01	197.700
1942-10-01	210.400
1942-11-01	194.700
1942-12-01	204.100
1943-01-01	200.500
1943-02-01	186.800
1943-03-01	211.300
1943-04-01	201.900
1943-05-01	200.500
1943-06-01	200.200
1943-07-01	201.600
1943-08-01	205.000