1961 01 99.99 -99.99  10.30 
1961 02 99.99 -99.99  12.20 
1961 03 99.99 -99.99  14.70 
1961 04 99.99 -99.99  19.70 
1961 05 99.99 -99.99  24.90 
1961 06 99.99 -99.99  26.10 
1961 07 99.99 -99.99  28.30 
1961 08 99.99 -99.99  26.40 
1961 09 99.99 -99.99  23.80 
1961 10 99.99 -99.99  20.50 
1961 11 99.99 -99.99  19.60 
1961 12 99.99 -99.99  13.00 
1962 01 99.99 -99.99  11.90 
1962 02 99.99 -99.99  12.30 
1962 03 99.99 -99.99  16.79 
1962 04 99.99 -99.99  19.40 
1962 05 99.99 -99.99  24.50 
1962 06 99.99 -99.99  26.10 
1962 07 99.99 -99.99  29.70 
1962 08 99.99 -99.99  27.70 
1962 09 99.99 -99.99  27.00 
1962 10 99.99 -99.99  22.50 
1962 11 99.99 -99.99  17.29 
1962 12 99.99 -99.99  10.80 
1963 01 99.99 -99.99  13.70 
1963 02 99.99 -99.99  15.10 
1963 03 99.99 -99.99  15.10 
1963 04 99.99 -99.99  18.50 
1963 05 99.99 -99.99  19.00 
1963 06 99.99 -99.99  26.90 
1963 07 99.99 -99.99  29.50 
1963 08 99.99 -99.99  29.30 
1963 09 99.99 -99.99  25.80 
1963 10 99.99 -99.99  20.20 
1963 11 99.99 -99.99  20.29 
1963 12 99.99 -99.99  15.10 
1964 01 99.99 -99.99   9.50 
1964 02 99.99 -99.99  13.90 
1964 03 99.99 -99.99  19.79 
1964 04 99.99 -99.99  20.20 
1964 05 99.99 -99.99  23.80 
1964 06 99.99 -99.99  28.10 
1964 07 99.99 -99.99  30.10 
1964 08 99.99 -99.99  31.30 
1964 09 99.99 -99.99  28.30 
1964 10 99.99 -99.99  23.40 
1964 12 99.99 -99.99  11.70 
1965 01 99.99 -99.99   9.89 
1965 02 99.99 -99.99   9.89 
1965 03 99.99 -99.99  16.10 
1965 04 99.99 -99.99  19.29 
1965 05 99.99 -99.99  23.90 
1965 06 99.99 -99.99  27.30 
1965 07 99.99 -99.99  31.90 
1965 08 99.99 -99.99  36.70 
1965 09 99.99 -99.99  22.10 
1965 10 99.99 -99.99  25.10 
1965 11 99.99 -99.99  16.70 
1965 12 99.99 -99.99  12.80 
1966 01 99.99 -99.99  15.10 
1966 02 99.99 -99.99  17.50 
1966 03 99.99 -99.99  14.20 
1966 04 99.99 -99.99  22.00 
1966 05 99.99 -99.99  24.00 
1966 06 99.99 -99.99  30.70 
1966 07 99.99 -99.99  28.70 
1966 08 99.99 -99.99  31.60 
1966 09 99.99 -99.99  27.10 
1966 10 99.99 -99.99  25.30 
1966 11 99.99 -99.99  18.50 
1966 12 99.99 -99.99  10.20 
1967 01 99.99 -99.99  10.10 
1967 02 99.99 -99.99  12.30 
1967 03 99.99 -99.99  15.30 
1967 04 99.99 -99.99  20.60 
1967 05 99.99 -99.99  28.30 
1967 06 99.99 -99.99  29.10 
1967 07 99.99 -99.99  30.10 
1967 08 99.99 -99.99  31.30 
1967 09 99.99 -99.99  29.50 
1967 10 99.99 -99.99  26.70 
1967 11 99.99 -99.99  24.50 
1967 12 99.99 -99.99  16.10 
1968 01 99.99 -99.99  11.00 
1968 02 99.99 -99.99  13.50 
1968 03 99.99 -99.99  19.50 
1968 04 99.99 -99.99  23.00 
1968 05 99.99 -99.99  28.20 
1968 06 99.99 -99.99  29.30 
1968 07 99.99 -99.99  31.50 
1968 08 99.99 -99.99  31.70 
1968 09 99.99 -99.99  28.50 
1968 12 99.99 -99.99  11.10 
1969 01 99.99 -99.99   9.20 
1969 02 99.99 -99.99  10.80 
1969 03 99.99 -99.99  16.20 
1969 04 99.99 -99.99  19.70 
1969 08 99.99 -99.99  30.20 
1969 09 99.99 -99.99  27.10 
1969 10 99.99 -99.99  20.70 
1969 11 99.99 -99.99  17.90 
1969 12 99.99 -99.99  11.90 
