1960 01 99.99 -99.99  19.20 
1960 11 99.99 -99.99  25.50 
1960 12 99.99 -99.99  22.10 
1961 01 99.99 -99.99  19.10 
1961 02 99.99 -99.99  18.20 
1962 02 99.99 -99.99  23.80 
1962 03 99.99 -99.99  27.40 
1962 04 99.99 -99.99  31.70 
1962 05 99.99 -99.99  32.59 
1963 02 99.99 -99.99  25.00 
1963 10 99.99 -99.99  29.90 
1963 12 99.99 -99.99  21.80 
1964 01 99.99 -99.99  17.60 
1964 02 99.99 -99.99  22.20 
1964 03 99.99 -99.99  29.30 
1964 04 99.99 -99.99  34.30 
1964 05 99.99 -99.99  35.40 
1964 06 99.99 -99.99  32.90 
1964 07 99.99 -99.99  31.20 
1964 08 99.99 -99.99  29.40 
1964 09 99.99 -99.99  30.00 
1964 10 99.99 -99.99  30.40 
1964 11 99.99 -99.99  26.80 
1964 12 99.99 -99.99  21.00 
1965 01 99.99 -99.99  21.30 
1965 02 99.99 -99.99  24.10 
1965 03 99.99 -99.99  27.60 
1965 04 99.99 -99.99  29.80 
1965 06 99.99 -99.99  33.90 
1965 07 99.99 -99.99  31.00 
1965 08 99.99 -99.99  29.50 
1965 09 99.99 -99.99  29.80 
1965 10 99.99 -99.99  30.60 
1965 11 99.99 -99.99  26.60 
1965 12 99.99 -99.99  19.90 
1966 01 99.99 -99.99  21.90 
1966 02 99.99 -99.99  25.70 
1966 03 99.99 -99.99  27.10 
1966 04 99.99 -99.99  31.70 
1966 05 99.99 -99.99  34.50 
1966 06 99.99 -99.99  33.50 
1966 07 99.99 -99.99  31.20 
1966 08 99.99 -99.99  30.20 
1966 09 99.99 -99.99  30.60 
1967 03 99.99 -99.99  26.10 
1967 04 99.99 -99.99  30.40 
1967 06 99.99 -99.99  33.40 
1967 07 99.99 -99.99  31.10 
1967 08 99.99 -99.99  29.00 
1967 09 99.99 -99.99  29.20 
1967 10 99.99 -99.99  29.80 
1967 11 99.99 -99.99  27.20 
1967 12 99.99 -99.99  22.20 
1968 01 99.99 -99.99  18.60 
1968 02 99.99 -99.99  20.70 
1968 03 99.99 -99.99  27.40 
1968 04 99.99 -99.99  31.90 
1968 05 99.99 -99.99  33.20 
1968 06 99.99 -99.99  34.09 
1968 07 99.99 -99.99  32.40 
1968 08 99.99 -99.99  30.00 
1968 09 99.99 -99.99  30.90 
1968 10 99.99 -99.99  31.10 
1968 11 99.99 -99.99  27.50 
1968 12 99.99 -99.99  21.90 
1969 01 99.99 -99.99  20.80 
1969 02 99.99 -99.99  22.90 
1969 03 99.99 -99.99  29.80 
1969 05 99.99 -99.99  33.59 
1969 06 99.99 -99.99  34.20 
1969 07 99.99 -99.99  32.40 
1969 08 99.99 -99.99  30.40 
1969 09 99.99 -99.99  31.60 
