1971 01 99.99 -99.99   7.10 
1971 02 99.99 -99.99  10.00 
1971 03 99.99 -99.99   8.89 
1971 08 99.99 -99.99  25.10 
1971 09 99.99 -99.99  24.00 
1971 10 99.99 -99.99  21.70 
1971 11 99.99 -99.99  14.30 
1971 12 99.99 -99.99  12.80 
1972 01 99.99 -99.99  10.60 
1972 02 99.99 -99.99  13.70 
1972 03 99.99 -99.99  10.70 
1972 08 99.99 -99.99  24.30 
1972 12 99.99 -99.99  14.90 
1973 02 99.99 -99.99   9.10 
1973 03 99.99 -99.99  14.40 
1973 08 99.99 -99.99  25.80 
1973 09 99.99 -99.99  23.50 
1973 10 99.99 -99.99  19.79 
1973 11 99.99 -99.99  15.60 
1973 12 99.99 -99.99  14.40 
1974 01 99.99 -99.99  14.00 
1974 02 99.99 -99.99  10.50 
1974 03 99.99 -99.99  12.80 
1974 12 99.99 -99.99   9.39 
1975 02 99.99 -99.99   8.89 
1975 03 99.99 -99.99  10.30 
1975 08 99.99 -99.99  24.80 
1975 12 99.99 -99.99  11.90 
1976 01 99.99 -99.99   9.60 
1976 02 99.99 -99.99  10.70 
1976 03 99.99 -99.99  11.10 
1976 08 99.99 -99.99  23.60 
1976 11 99.99 -99.99   6.60 
1976 12 99.99 -99.99  10.00 
1977 01 99.99 -99.99   5.50 
1977 02 99.99 -99.99  10.70 
1977 03 99.99 -99.99  12.30 
