1950 10 99.99 -99.99  24.70 
1950 11 99.99 -99.99  29.50 
1950 12 99.99 -99.99  28.50 
1951 01 99.99 -99.99  28.10 
1951 02 99.99 -99.99  28.20 
1951 03 99.99 -99.99  27.80 
1951 04 99.99 -99.99  24.00 
1951 05 99.99 -99.99  19.00 
1951 07 99.99 -99.99  16.00 
1951 08 99.99 -99.99  17.90 
1951 09 99.99 -99.99  22.50 
1951 10 99.99 -99.99  26.60 
1951 11 99.99 -99.99  29.80 
1951 12 99.99 -99.99  30.70 
1952 01 99.99 -99.99  31.10 
1952 02 99.99 -99.99  30.40 
1952 03 99.99 -99.99  28.70 
1952 04 99.99 -99.99  23.80 
1952 05 99.99 -99.99  22.40 
1952 06 99.99 -99.99  16.00 
1952 07 99.99 -99.99  17.40 
1952 08 99.99 -99.99  18.20 
1952 09 99.99 -99.99  23.60 
1952 10 99.99 -99.99  27.60 
1952 11 99.99 -99.99  28.50 
1952 12 99.99 -99.99  30.80 
1953 01 99.99 -99.99  28.50 
1953 02 99.99 -99.99  25.40 
1953 03 99.99 -99.99  27.10 
1953 04 99.99 -99.99  26.30 
1953 05 99.99 -99.99  19.10 
1953 06 99.99 -99.99  19.50 
1953 07 99.99 -99.99  16.79 
1953 08 99.99 -99.99  17.50 
1953 09 99.99 -99.99  23.00 
1953 10 99.99 -99.99  28.40 
1953 11 99.99 -99.99  30.80 
1953 12 99.99 -99.99  31.00 
1954 01 99.99 -99.99  29.90 
1954 02 99.99 -99.99  29.20 
1954 03 99.99 -99.99  28.20 
1954 04 99.99 -99.99  26.30 
1954 05 99.99 -99.99  20.60 
1954 07 99.99 -99.99  18.00 
1954 08 99.99 -99.99  19.90 
1954 09 99.99 -99.99  22.90 
1954 10 99.99 -99.99  27.40 
1954 11 99.99 -99.99  30.20 
1954 12 99.99 -99.99  29.40 
1955 02 99.99 -99.99  29.20 
1955 03 99.99 -99.99  28.00 
1955 04 99.99 -99.99  25.40 
1955 08 99.99 -99.99  20.50 
1955 09 99.99 -99.99  24.70 
1955 10 99.99 -99.99  29.40 
1955 11 99.99 -99.99  28.10 
1956 01 99.99 -99.99  30.00 
1956 02 99.99 -99.99  28.40 
1956 06 99.99 -99.99  16.60 
1956 07 99.99 -99.99  18.60 
1956 09 99.99 -99.99  20.80 
1956 10 99.99 -99.99  27.10 
1956 11 99.99 -99.99  29.10 
1956 12 99.99 -99.99  29.60 
