1958 04 99.99 -99.99  32.50 
1958 05 99.99 -99.99  34.50 
1958 06 99.99 -99.99  34.70 
1958 07 99.99 -99.99  31.80 
1958 08 99.99 -99.99  31.90 
1958 09 99.99 -99.99  30.20 
1958 10 99.99 -99.99  29.00 
1958 11 99.99 -99.99  23.10 
1958 12 99.99 -99.99  19.79 
1963 01 99.99 -99.99  16.60 
1963 02 99.99 -99.99  21.20 
1963 03 99.99 -99.99  25.70 
1963 04 99.99 -99.99  30.80 
1963 05 99.99 -99.99  33.30 
1963 06 99.99 -99.99  33.50 
1963 07 99.99 -99.99  32.30 
1963 08 99.99 -99.99  30.50 
1963 09 99.99 -99.99  30.10 
1963 10 99.99 -99.99  27.70 
1965 08 99.99 -99.99  30.00 
1965 09 99.99 -99.99  29.90 
1965 10 99.99 -99.99  30.00 
1965 11 99.99 -99.99  24.20 
1965 12 99.99 -99.99  16.50 
1966 01 99.99 -99.99  18.10 
1966 02 99.99 -99.99  22.70 
1966 03 99.99 -99.99  24.30 
1966 04 99.99 -99.99  29.90 
1966 05 99.99 -99.99  33.09 
1966 06 99.99 -99.99  32.90 
1966 07 99.99 -99.99  31.40 
1966 08 99.99 -99.99  30.20 
1966 09 99.99 -99.99  30.60 
1966 11 99.99 -99.99  22.40 
1966 12 99.99 -99.99  16.79 
1967 01 99.99 -99.99  14.30 
1967 02 99.99 -99.99  22.10 
1967 03 99.99 -99.99  24.80 
1967 04 99.99 -99.99  29.00 
1967 05 99.99 -99.99  32.59 
1967 06 99.99 -99.99  33.20 
1967 07 99.99 -99.99  31.50 
1967 08 99.99 -99.99  29.60 
1967 09 99.99 -99.99  29.50 
1967 10 99.99 -99.99  28.80 
1967 11 99.99 -99.99  25.60 
1967 12 99.99 -99.99  18.50 
1968 01 99.99 -99.99  15.80 
1968 02 99.99 -99.99  18.60 
1968 03 99.99 -99.99  25.20 
1968 04 99.99 -99.99  30.60 
1968 05 99.99 -99.99  32.09 
1968 06 99.99 -99.99  33.80 
1968 07 99.99 -99.99  32.80 
1968 08 99.99 -99.99  30.50 
1968 09 99.99 -99.99  30.50 
1968 10 99.99 -99.99  28.40 
1968 11 99.99 -99.99  24.30 
1968 12 99.99 -99.99  18.40 
1969 05 99.99 -99.99  33.80 
1969 06 99.99 -99.99  34.09 
1969 07 99.99 -99.99  32.59 
1969 08 99.99 -99.99  30.00 
1969 09 99.99 -99.99  31.10 
1969 10 99.99 -99.99  30.70 
1969 11 99.99 -99.99  25.70 
1969 12 99.99 -99.99  20.50 
1970 02 99.99 -99.99  19.79 
1970 03 99.99 -99.99  25.50 
1970 04 99.99 -99.99  31.90 
1970 05 99.99 -99.99  34.40 
1970 06 99.99 -99.99  33.09 
1970 07 99.99 -99.99  31.70 
1970 09 99.99 -99.99  29.20 
1970 10 99.99 -99.99  29.20 
1970 11 99.99 -99.99  21.90 
1970 12 99.99 -99.99  17.50 
1971 01 99.99 -99.99  17.10 
1971 02 99.99 -99.99  19.79 
1971 03 99.99 -99.99  24.80 
1971 04 99.99 -99.99  32.59 
1971 05 99.99 -99.99  32.90 
1971 06 99.99 -99.99  31.90 
1971 07 99.99 -99.99  30.30 
1971 08 99.99 -99.99  29.80 
1971 09 99.99 -99.99  30.90 
1972 04 99.99 -99.99  29.90 
1972 05 99.99 -99.99  33.50 
