1957 03 99.99 -99.99  23.50 
1957 05 99.99 -99.99  29.20 
1957 12 99.99 -99.99  15.60 
1961 01 99.99 -99.99  15.90 
1961 02 99.99 -99.99  16.20 
1961 03 99.99 -99.99  24.20 
1961 04 99.99 -99.99  27.90 
1961 06 99.99 -99.99  34.70 
1961 07 99.99 -99.99  35.50 
1961 08 99.99 -99.99  33.50 
1961 09 99.99 -99.99  31.30 
1961 10 99.99 -99.99  28.30 
1961 11 99.99 -99.99  21.90 
1963 04 99.99 -99.99  30.00 
1963 05 99.99 -99.99  32.59 
1963 06 99.99 -99.99  35.80 
1963 09 99.99 -99.99  33.00 
1963 12 99.99 -99.99  17.00 
1964 03 99.99 -99.99  25.80 
1964 04 99.99 -99.99  30.80 
1964 05 99.99 -99.99  33.20 
1964 06 99.99 -99.99  34.50 
1964 07 99.99 -99.99  34.00 
1964 08 99.99 -99.99  32.80 
1964 09 99.99 -99.99  31.10 
1964 10 99.99 -99.99  26.20 
1964 11 99.99 -99.99  18.70 
1964 12 99.99 -99.99  15.30 
1965 03 99.99 -99.99  24.10 
1965 04 99.99 -99.99  25.20 
1965 05 99.99 -99.99  31.50 
1965 06 99.99 -99.99  35.40 
1965 07 99.99 -99.99  34.09 
1965 08 99.99 -99.99  32.59 
1965 09 99.99 -99.99  30.80 
1965 10 99.99 -99.99  28.70 
1965 11 99.99 -99.99  23.00 
1965 12 99.99 -99.99  14.40 
1966 01 99.99 -99.99  15.70 
1966 02 99.99 -99.99  19.90 
1966 03 99.99 -99.99  23.00 
1966 04 99.99 -99.99  28.60 
1966 05 99.99 -99.99  32.80 
1966 06 99.99 -99.99  34.80 
1966 07 99.99 -99.99  33.80 
1966 08 99.99 -99.99  32.40 
1966 09 99.99 -99.99  30.30 
1966 10 99.99 -99.99  27.80 
1966 11 99.99 -99.99  19.60 
1966 12 99.99 -99.99  14.10 
1967 01 99.99 -99.99  12.40 
1967 02 99.99 -99.99  19.90 
1967 03 99.99 -99.99  21.90 
1967 04 99.99 -99.99  27.70 
1967 05 99.99 -99.99  32.59 
1967 06 99.99 -99.99  35.70 
1967 07 99.99 -99.99  34.50 
1967 08 99.99 -99.99  33.20 
1967 09 99.99 -99.99  31.60 
1967 10 99.99 -99.99  31.10 
1967 11 99.99 -99.99  21.70 
1967 12 99.99 -99.99  14.80 
1968 01 99.99 -99.99  12.80 
1968 02 99.99 -99.99  15.10 
1968 03 99.99 -99.99  23.50 
1968 05 99.99 -99.99  32.09 
1968 06 99.99 -99.99  36.09 
1968 07 99.99 -99.99  35.00 
1968 08 99.99 -99.99  33.09 
1968 09 99.99 -99.99  31.10 
1968 10 99.99 -99.99  27.10 
1968 11 99.99 -99.99  22.00 
1968 12 99.99 -99.99  14.80 
1969 01 99.99 -99.99  15.00 
1969 02 99.99 -99.99  16.79 
1969 03 99.99 -99.99  26.50 
1969 04 99.99 -99.99  29.60 
1969 05 99.99 -99.99  33.40 
1969 06 99.99 -99.99  36.09 
1969 07 99.99 -99.99  34.80 
1969 08 99.99 -99.99  32.40 
1969 09 99.99 -99.99  31.30 
1970 04 99.99 -99.99  30.90 
1970 05 99.99 -99.99  35.40 
1970 06 99.99 -99.99  35.40 
1970 07 99.99 -99.99  35.09 
1970 08 99.99 -99.99  33.59 
1970 09 99.99 -99.99  31.10 
1970 10 99.99 -99.99  28.50 
1970 11 99.99 -99.99  20.80 
1971 01 99.99 -99.99  13.90 
1971 02 99.99 -99.99  19.10 
1971 03 99.99 -99.99  25.40 
1971 04 99.99 -99.99  31.60 
1971 05 99.99 -99.99  34.00 
1971 06 99.99 -99.99  35.70 
1971 07 99.99 -99.99  34.09 
1971 08 99.99 -99.99  32.80 
1971 09 99.99 -99.99  31.80 
1971 10 99.99 -99.99  27.10 
1971 11 99.99 -99.99  22.00 
1971 12 99.99 -99.99  16.50 
1972 01 99.99 -99.99  15.90 
1972 02 99.99 -99.99  16.40 
1972 03 99.99 -99.99  25.10 
1972 04 99.99 -99.99  28.30 
1972 05 99.99 -99.99  33.59 
