1961 01 99.99 -99.99  14.10 
1961 02 99.99 -99.99  15.20 
1961 03 99.99 -99.99  16.79 
1961 04 99.99 -99.99  20.29 
1961 05 99.99 -99.99  21.50 
1961 06 99.99 -99.99  19.29 
1961 07 99.99 -99.99  18.10 
1961 08 99.99 -99.99  18.60 
1961 09 99.99 -99.99  18.50 
1961 10 99.99 -99.99  17.20 
1961 11 99.99 -99.99  16.20 
1961 12 99.99 -99.99  14.60 
1962 01 99.99 -99.99  14.10 
1962 02 99.99 -99.99  17.00 
1962 03 99.99 -99.99  18.29 
1962 04 99.99 -99.99  17.90 
1962 05 99.99 -99.99  20.90 
1962 06 99.99 -99.99  20.80 
1962 07 99.99 -99.99  19.40 
1962 08 99.99 -99.99  19.10 
1962 09 99.99 -99.99  18.40 
1962 10 99.99 -99.99  17.70 
1962 11 99.99 -99.99  15.30 
1962 12 99.99 -99.99  14.50 
1970 01 99.99 -99.99  14.10 
1970 02 99.99 -99.99  14.90 
1970 03 99.99 -99.99  18.90 
1970 04 99.99 -99.99  21.90 
1970 05 99.99 -99.99  21.10 
1970 06 99.99 -99.99  20.00 
1970 07 99.99 -99.99  19.29 
1970 08 99.99 -99.99  19.10 
1970 09 99.99 -99.99  18.10 
1970 10 99.99 -99.99  18.20 
1970 11 99.99 -99.99  14.70 
1970 12 99.99 -99.99  15.40 
