1961 01 99.99 -99.99  23.70 
1961 02 99.99 -99.99  24.90 
1961 03 99.99 -99.99  27.90 
1961 04 99.99 -99.99  30.90 
1961 05 99.99 -99.99  30.10 
1961 06 99.99 -99.99  27.30 
1961 07 99.99 -99.99  26.60 
1961 08 99.99 -99.99  26.70 
1961 09 99.99 -99.99  26.60 
1961 10 99.99 -99.99  27.10 
1961 11 99.99 -99.99  25.50 
1961 12 99.99 -99.99  22.90 
1962 01 99.99 -99.99  22.80 
1962 02 99.99 -99.99  25.30 
1962 03 99.99 -99.99  27.90 
1962 04 99.99 -99.99  30.30 
1962 05 99.99 -99.99  29.80 
1962 06 99.99 -99.99  27.10 
1962 07 99.99 -99.99  26.80 
1962 08 99.99 -99.99  27.20 
1962 09 99.99 -99.99  27.40 
1962 10 99.99 -99.99  28.00 
1962 11 99.99 -99.99  25.20 
1962 12 99.99 -99.99  22.90 
1963 01 99.99 -99.99  22.70 
1963 02 99.99 -99.99  25.20 
1963 03 99.99 -99.99  28.10 
1963 04 99.99 -99.99  30.10 
1963 05 99.99 -99.99  30.70 
1963 06 99.99 -99.99  27.60 
1963 07 99.99 -99.99  26.30 
1963 08 99.99 -99.99  26.90 
1963 09 99.99 -99.99  27.30 
1963 10 99.99 -99.99  27.20 
1963 11 99.99 -99.99  25.70 
1963 12 99.99 -99.99  23.50 
1964 01 99.99 -99.99  22.20 
1964 02 99.99 -99.99  25.00 
1964 03 99.99 -99.99  28.70 
1964 04 99.99 -99.99  30.50 
1964 05 99.99 -99.99  28.70 
1964 06 99.99 -99.99  27.10 
1964 07 99.99 -99.99  27.30 
1964 08 99.99 -99.99  26.70 
1964 09 99.99 -99.99  27.30 
1964 10 99.99 -99.99  27.50 
1964 11 99.99 -99.99  26.40 
1964 12 99.99 -99.99  22.30 
1965 01 99.99 -99.99  22.20 
1965 02 99.99 -99.99  24.30 
1965 03 99.99 -99.99  27.00 
1965 04 99.99 -99.99  30.40 
1965 05 99.99 -99.99  29.50 
1965 06 99.99 -99.99  26.50 
1965 07 99.99 -99.99  26.90 
1965 08 99.99 -99.99  27.10 
1965 09 99.99 -99.99  26.90 
1965 10 99.99 -99.99  26.80 
1965 11 99.99 -99.99  25.50 
1965 12 99.99 -99.99  24.30 
1966 01 99.99 -99.99  23.30 
1966 02 99.99 -99.99  25.10 
1966 03 99.99 -99.99  27.80 
1966 04 99.99 -99.99  31.20 
1966 05 99.99 -99.99  30.40 
1966 06 99.99 -99.99  27.10 
1966 07 99.99 -99.99  26.80 
1966 08 99.99 -99.99  26.70 
1966 09 99.99 -99.99  27.10 
1966 10 99.99 -99.99  27.50 
1966 11 99.99 -99.99  27.70 
1966 12 99.99 -99.99  24.50 
1967 01 99.99 -99.99  24.00 
1967 02 99.99 -99.99  24.50 
1967 03 99.99 -99.99  28.00 
1967 04 99.99 -99.99  30.50 
1967 05 99.99 -99.99  30.30 
1967 06 99.99 -99.99  27.90 
1967 07 99.99 -99.99  27.10 
1967 08 99.99 -99.99  26.60 
1967 09 99.99 -99.99  26.90 
1967 10 99.99 -99.99  27.30 
1967 11 99.99 -99.99  25.60 
1967 12 99.99 -99.99  23.30 
1968 01 99.99 -99.99  22.70 
1968 02 99.99 -99.99  23.50 
1968 03 99.99 -99.99  28.50 
1968 04 99.99 -99.99  29.90 
1968 05 99.99 -99.99  29.20 
1968 06 99.99 -99.99  27.30 
1968 07 99.99 -99.99  27.00 
1968 08 99.99 -99.99  26.50 
1968 09 99.99 -99.99  27.50 
1968 10 99.99 -99.99  27.50 
1968 11 99.99 -99.99  26.50 
1968 12 99.99 -99.99  24.00 
1969 01 99.99 -99.99  22.50 
1969 02 99.99 -99.99  25.00 
1969 03 99.99 -99.99  29.00 
1969 04 99.99 -99.99  31.00 
1969 05 99.99 -99.99  30.70 
1969 06 99.99 -99.99  27.60 
1969 07 99.99 -99.99  27.10 
1969 08 99.99 -99.99  26.40 
1969 09 99.99 -99.99  27.20 
1969 10 99.99 -99.99  27.90 
1969 11 99.99 -99.99  26.10 
1969 12 99.99 -99.99  23.50 
1970 01 99.99 -99.99  23.10 
1970 02 99.99 -99.99  24.90 
1970 03 99.99 -99.99  28.90 
1970 04 99.99 -99.99  31.20 
1970 05 99.99 -99.99  29.00 
1970 06 99.99 -99.99  27.60 
1970 07 99.99 -99.99  26.90 
1970 08 99.99 -99.99  26.90 
1970 09 99.99 -99.99  27.30 
1970 10 99.99 -99.99  27.50 
1970 11 99.99 -99.99  25.50 
1970 12 99.99 -99.99  23.50 
