1961 01 99.99 -99.99  24.40 
1961 02 99.99 -99.99  25.00 
1961 03 99.99 -99.99  26.50 
1961 04 99.99 -99.99  25.60 
1961 06 99.99 -99.99  26.60 
1961 07 99.99 -99.99  26.70 
1961 08 99.99 -99.99  26.90 
1961 09 99.99 -99.99  26.90 
1961 10 99.99 -99.99  26.70 
1961 11 99.99 -99.99  25.60 
1961 12 99.99 -99.99  24.80 
1962 01 99.99 -99.99  25.20 
1962 02 99.99 -99.99  24.90 
1962 03 99.99 -99.99  25.40 
1962 04 99.99 -99.99  24.90 
1962 05 99.99 -99.99  25.40 
1962 06 99.99 -99.99  27.00 
1962 07 99.99 -99.99  27.80 
1962 08 99.99 -99.99  27.30 
1962 09 99.99 -99.99  27.30 
1962 11 99.99 -99.99  25.80 
1963 05 99.99 -99.99  26.70 
1963 06 99.99 -99.99  28.00 
1963 12 99.99 -99.99  26.00 
1964 02 99.99 -99.99  25.40 
1964 03 99.99 -99.99  25.60 
1964 04 99.99 -99.99  25.40 
1964 06 99.99 -99.99  27.40 
1965 03 99.99 -99.99  24.90 
1966 01 99.99 -99.99  24.80 
1966 02 99.99 -99.99  23.30 
1966 06 99.99 -99.99  26.20 
1966 08 99.99 -99.99  27.50 
1966 09 99.99 -99.99  27.70 
1966 10 99.99 -99.99  27.10 
1967 01 99.99 -99.99  24.70 
