1971 12 33.04  24.52  28.78 
1972 01 33.38  25.62  29.50 
1972 02 35.55 -99.99 -99.99 
1972 03 34.43  25.36  29.90 
1972 04 32.50  22.34  27.42 
1972 05 29.18  18.11  23.64 
1972 06 99.99  16.59 -99.99 
1972 07 99.99  14.99 -99.99 
1972 08 24.72  15.55  20.13 
1972 09 28.99  19.27  24.13 
1972 10 30.72  20.19  25.45 
1972 11 34.45  23.74  29.09 
1972 12 34.49  25.72  30.10 
1973 02 35.04  26.56  30.80 
1973 03 33.25  26.18  29.71 
1973 04 31.42  22.57  26.99 
1973 05 27.63  19.92  23.77 
1973 06 24.54  16.37  20.45 
1973 07 25.71  18.29  22.00 
1973 08 25.85  17.45  21.65 
1973 09 27.54  17.44  22.49 
1973 10 31.33  20.66  25.99 
1973 11 32.78  23.60  28.18 
1973 12 99.99  26.47 -99.99 
1974 01 32.55  25.26  28.90 
1974 02 33.90  26.58  30.24 
1974 03 35.28  25.81  30.54 
1974 04 31.12  22.64  26.88 
1974 05 27.20  19.27  23.23 
