Month	Hours
1921-07-01	203.600
1921-08-01	214.600
1921-09-01	204.800
1921-10-01	214.200
1921-11-01	202.800
1921-12-01	203.900
1922-01-01	203.700
1922-02-01	190.000
1922-03-01	215.700
1922-04-01	200.600
1922-05-01	210.600
1922-06-01	209.100
1922-07-01	217.800
1922-08-01	236.400
1922-09-01	228.600
1922-10-01	232.500
1922-11-01	220.600
1922-12-01	220.800
1923-01-01	225.900
1923-02-01	202.500
1923-03-01	228.000
1923-04-01	215.000
1923-05-01	222.800
1923-06-01	217.500
1923-07-01	215.900
1923-08-01	222.600
1923-09-01	207.900
1923-10-01	226.000
1923-11-01	207.700
1923-12-01	204.600
1924-01-01	215.200
1924-02-01	202.800
1924-03-01	215.300
1924-04-01	209.300
1924-05-01	211.900
1924-06-01	203.000
1924-07-01	209.800
1924-08-01	210.100
1924-09-01	208.000
1924-10-01	221.500
1924-11-01	202.600
1924-12-01	212.800
1925-01-01	216.500
1925-02-01	194.600
1925-03-01	213.800
1925-04-01	209.000
1925-05-01	208.800
1925-06-01	210.500
1925-07-01	213.600
1925-08-01	213.000
1925-09-01	208.500
1925-10-01	220.900
1925-11-01	205.500
1925-12-01	213.000
1926-01-01	209.800
1926-02-01	195.900
1926-03-01	220.400
1926-04-01	210.500
1926-05-01	210.600
1926-06-01	211.600
1926-07-01	213.200
1926-08-01	215.100
1926-09-01	210.000
1926-10-01	217.200
1926-11-01	209.600
1926-12-01	214.500
1927-01-01	211.300
1927-02-01	193.200
1927-03-01	218.800
1927-04-01	210.300
1927-05-01	211.000
1927-06-01	211.100
1927-07-01	206.700
1927-08-01	217.700
1927-09-01	207.400
1927-10-01	214.700
1927-11-01	205.000
1927-12-01	208.200
1928-01-01	208.600
1928-02-01	198.200
1928-03-01	216.300
1928-04-01	204.200
1928-05-01	213.200
1928-06-01	208.100
1928-07-01	207.200
1928-08-01	217.200
1928-09-01	202.700
1928-10-01	221.300
1928-11-01	205.900
1928-12-01	203.800
1929-01-01	214.100
1929-02-01	193.700
1929-03-01	213.800
1929-04-01	211.300
1929-05-01	214.700
1929-06-01	206.500
1929-07-01	214.400
1929-08-01	217.600
1929-09-01	203.500
1929-10-01	220.300
1929-11-01	203.700
1929-12-01	204.900
1930-01-01	211.000
1930-02-01	189.800
1930-03-01	208.600
1930-04-01	206.100
1930-05-01	206.800
1930-06-01	198.600
1930-07-01	202.500
1930-08-01	201.700
1930-09-01	196.300
1930-10-01	207.800
1930-11-01	189.200
1930-12-01	196.100
1931-01-01	197.100
1931-02-01	178.300
1931-03-01	198.500
1931-04-01	195.700
1931-05-01	193.800
1931-06-01	194.000
1931-07-01	195.100
1931-08-01	191.400
1931-09-01	186.500
1931-10-01	193.800
1931-11-01	177.700
1931-12-01	183.900
1932-01-01	181.000
1932-02-01	176.300
1932-03-01	192.200
1932-04-01	182.800
1932-05-01	181.700
1932-06-01	180.800
1932-07-01	175.000
1932-08-01	182.700
1932-09-01	175.100
1932-10-01	181.800
1932-11-01	175.100
1932-12-01	177.900
1933-01-01	177.300
1933-02-01	162.800
1933-03-01	179.800
1933-04-01	171.600
1933-05-01	182.900
1933-06-01	182.300
1933-07-01	183.600
1933-08-01	191.700
1933-09-01	181.500
1933-10-01	188.700
1933-11-01	178.300
1933-12-01	179.400
1934-01-01	186.600
1934-02-01	172.700
1934-03-01	193.700
1934-04-01	182.000
1934-05-01	190.600
1934-06-01	187.800
1934-07-01	185.600
1934-08-01	192.800
1934-09-01	180.000
1934-10-01	195.400
1934-11-01	181.700
1934-12-01	183.500
1935-01-01	195.400
1935-02-01	174.400
1935-03-01	190.400
1935-04-01	187.400
1935-05-01	191.300
1935-06-01	184.500
1935-07-01	190.300
1935-08-01	193.800
1935-09-01	183.400
1935-10-01	200.500
1935-11-01	185.900
1935-12-01	190.400
1936-01-01	201.600
1936-02-01	193.600
1936-03-01	201.400
1936-04-01	195.600
1936-05-01	193.400
1936-06-01	195.000
1936-07-01	200.100
1936-08-01	198.000
1936-09-01	195.400
1936-10-01	207.100
1936-11-01	191.100
1936-12-01	202.200
1937-01-01	198.500
1937-02-01	184.500
1937-03-01	209.100
1937-04-01	200.000
1937-05-01	198.700
1937-06-01	200.200
1937-07-01	201.400
1937-08-01	199.800
1937-09-01	195.000
1937-10-01	200.200
1937-11-01	190.000
1937-12-01	194.900
1938-01-01	191.700
1938-02-01	176.600
1938-03-01	201.500
1938-04-01	191.000
1938-05-01	191.400
1938-06-01	193.800
1938-07-01	191.900
1938-08-01	202.600
1938-09-01	194.500
1938-10-01	201.800
1938-11-01	193.600
1938-12-01	198.200
1939-01-01	197.300
1939-02-01	180.600
1939-03-01	205.400
1939-04-01	190.300
1939-05-01	200.800
1939-06-01	198.600
1939-07-01	194.800
1939-08-01	205.000
1939-09-01	197.500
1939-10-01	206.900
1939-11-01	196.900
1939-12-01	195.400
1940-01-01	206.100
1940-02-01	187.900
1940-03-01	199.500
1940-04-01	198.500
1940-05-01	201.400
1940-06-01	194.300
1940-07-01	202.900
1940-08-01	207.100
1940-09-01	193.800
1940-10-01	210.100
1940-11-01	197.000
1940-12-01	201.000
1941-01-01	207.700
1941-02-01	187.400
1941-03-01	208.900
1941-04-01	203.400
1941-05-01	209.700
1941-06-01	205.800
1941-07-01	211.900
1941-08-01	211.400
1941-09-01	206.000
1941-10-01	218.200
1941-11-01	199.800
1941-12-01	211.200
1942-01-01	213.900
1942-02-01	193.100
1942-03-01	215.000
1942-04-01	209.500
1942-05-01	209.300
1942-06-01	209.900
1942-07-01	212.800
1942-08-01	216.800
1942-09-01	212.600
1942-10-01	226.500
1942-11-01	211.200
1942-12-01	222.000
1943-01-01	219.600
1943-02-01	204.900
1943-03-01	230.700
1943-04-01	219.900
1943-05-01	221.300
1943-06-01	220.700
1943-07-01	224.300
1943-08-01	229.100