1937 04 99.99 -99.99  29.00 
1937 05 99.99 -99.99  28.40 
1937 06 99.99 -99.99  28.40 
1937 07 99.99 -99.99  27.70 
1937 08 99.99 -99.99  28.20 
1937 09 99.99 -99.99  27.60 
1937 10 99.99 -99.99  26.70 
1937 11 99.99 -99.99  26.10 
1937 12 99.99 -99.99  25.20 
1938 01 99.99 -99.99  25.30 
1938 02 99.99 -99.99  26.30 
1938 03 99.99 -99.99  27.40 
1938 04 99.99 -99.99  28.70 
1938 05 99.99 -99.99  28.40 
1938 06 99.99 -99.99  27.50 
1938 07 99.99 -99.99  27.40 
1938 08 99.99 -99.99  27.60 
1938 09 99.99 -99.99  27.00 
1938 10 99.99 -99.99  26.90 
1938 11 99.99 -99.99  25.70 
1938 12 99.99 -99.99  25.30 
1939 01 99.99 -99.99  24.90 
1939 02 99.99 -99.99  25.30 
1939 03 99.99 -99.99  26.90 
1939 04 99.99 -99.99  27.90 
1939 05 99.99 -99.99  27.90 
1939 06 99.99 -99.99  28.60 
1939 07 99.99 -99.99  28.70 
1939 08 99.99 -99.99  28.80 
1939 09 99.99 -99.99  28.60 
1939 10 99.99 -99.99  28.00 
1939 11 99.99 -99.99  27.00 
1939 12 99.99 -99.99  25.50 
1940 01 99.99 -99.99  25.80 
1940 02 99.99 -99.99  26.80 
1940 03 99.99 -99.99  28.90 
1940 04 99.99 -99.99  30.70 
1940 05 99.99 -99.99  28.90 
1940 06 99.99 -99.99  28.20 
1940 07 99.99 -99.99  28.10 
1940 08 99.99 -99.99  27.60 
1940 09 99.99 -99.99  27.50 
1940 10 99.99 -99.99  27.70 
1940 11 99.99 -99.99  26.10 
1940 12 99.99 -99.99  25.70 
1941 01 99.99 -99.99  26.00 
1941 02 99.99 -99.99  26.40 
1941 03 99.99 -99.99  27.80 
1941 04 99.99 -99.99  29.70 
1941 05 99.99 -99.99  28.70 
1941 06 99.99 -99.99  28.70 
1941 07 99.99 -99.99  27.80 
1941 08 99.99 -99.99  27.80 
1941 09 99.99 -99.99  27.90 
1941 10 99.99 -99.99  27.10 
1941 11 99.99 -99.99  26.30 
1941 12 99.99 -99.99  26.10 
1946 01 99.99 -99.99  25.20 
1946 02 99.99 -99.99  26.20 
1946 03 99.99 -99.99  27.70 
1946 04 99.99 -99.99  28.20 
1946 05 99.99 -99.99  28.10 
1946 06 99.99 -99.99  28.10 
1946 07 99.99 -99.99  27.70 
1946 08 99.99 -99.99  27.60 
1946 09 99.99 -99.99  27.30 
1946 10 99.99 -99.99  27.00 
1946 11 99.99 -99.99  26.40 
1946 12 99.99 -99.99  26.30 
1947 01 99.99 -99.99  27.10 
1947 02 99.99 -99.99  27.40 
1947 03 99.99 -99.99  27.40 
1947 04 99.99 -99.99  28.10 
1947 05 99.99 -99.99  29.30 
1947 06 99.99 -99.99  28.10 
1947 07 99.99 -99.99  28.20 
1947 08 99.99 -99.99  28.10 
1947 09 99.99 -99.99  27.90 
1947 10 99.99 -99.99  26.90 
1947 11 99.99 -99.99  26.70 
1947 12 99.99 -99.99  25.70 
1948 01 99.99 -99.99  25.60 
1948 02 99.99 -99.99  27.10 
1948 03 99.99 -99.99  28.30 
1948 04 99.99 -99.99  28.80 
1948 05 99.99 -99.99  28.30 
1948 06 99.99 -99.99  27.90 
1948 07 99.99 -99.99  27.70 
1948 08 99.99 -99.99  27.60 
1948 09 99.99 -99.99  27.20 
1948 10 99.99 -99.99  27.10 
1948 11 99.99 -99.99  25.40 
1948 12 99.99 -99.99  26.10 
1949 01 99.99 -99.99  26.20 
1949 02 99.99 -99.99  26.50 
1949 03 99.99 -99.99  28.10 
1949 04 99.99 -99.99  29.00 
1949 05 99.99 -99.99  28.60 
1949 06 99.99 -99.99  28.20 
1949 07 99.99 -99.99  27.50 
1949 08 99.99 -99.99  27.80 
1949 09 99.99 -99.99  27.30 
1949 10 99.99 -99.99  27.00 
1949 11 99.99 -99.99  26.70 
1949 12 99.99 -99.99  26.10 
1950 01 99.99 -99.99  26.40 
1950 02 99.99 -99.99  27.70 
1950 03 99.99 -99.99  28.40 
1950 04 99.99 -99.99  28.90 
1950 05 99.99 -99.99  28.20 
1950 06 99.99 -99.99  28.00 
1950 07 99.99 -99.99  27.40 
1950 08 99.99 -99.99  27.70 
1950 09 99.99 -99.99  27.10 
1950 10 99.99 -99.99  27.10 
1950 11 99.99 -99.99  26.00 
1950 12 99.99 -99.99  25.60 
