1952 03 99.99 -99.99  10.40 
1952 04 99.99 -99.99  14.80 
1952 06 99.99 -99.99  23.20 
1952 07 99.99 -99.99  26.60 
1952 08 99.99 -99.99  26.40 
1952 10 99.99 -99.99  17.70 
1953 11 99.99 -99.99  14.20 
1953 12 99.99 -99.99  12.30 
1954 01 99.99 -99.99   7.70 
1954 03 99.99 -99.99  12.40 
1954 05 99.99 -99.99  16.70 
1954 06 99.99 -99.99  23.30 
1954 08 99.99 -99.99  24.50 
1954 10 99.99 -99.99  17.20 
1954 12 99.99 -99.99  12.20 
1955 01 99.99 -99.99  12.40 
1955 04 99.99 -99.99  13.00 
1955 05 99.99 -99.99  18.50 
1955 06 99.99 -99.99  21.70 
1955 07 99.99 -99.99  24.80 
1955 08 99.99 -99.99  23.90 
1955 11 99.99 -99.99  13.60 
1955 12 99.99 -99.99  13.00 
1956 01 99.99 -99.99  10.50 
1956 02 99.99 -99.99   5.40 
1956 03 99.99 -99.99  10.20 
1956 04 99.99 -99.99  13.50 
1956 07 99.99 -99.99  24.80 
1956 08 99.99 -99.99  26.10 
1956 09 99.99 -99.99  23.10 
1956 10 99.99 -99.99  18.10 
1957 02 99.99 -99.99  12.20 
1958 01 99.99 -99.99  10.10 
1958 03 99.99 -99.99   9.39 
1958 04 99.99 -99.99  12.90 
1958 05 99.99 -99.99  19.10 
1958 07 99.99 -99.99  25.00 
1958 08 99.99 -99.99  26.00 
1958 09 99.99 -99.99  21.90 
1958 10 99.99 -99.99  18.79 
1959 03 99.99 -99.99  13.40 
1959 05 99.99 -99.99  17.90 
1959 06 99.99 -99.99  21.40 
1959 07 99.99 -99.99  24.10 
1959 08 99.99 -99.99  23.90 
1959 09 99.99 -99.99  20.20 
1960 08 99.99 -99.99  25.10 
