1973 01 37.21  25.64  31.42 
1973 02 35.33  24.60  29.96 
1973 03 31.48  23.82  27.65 
1973 04 32.12  22.66  27.39 
1973 05 32.34  19.26  25.80 
1973 06 30.67  18.20  24.43 
1973 07 30.18  15.15  22.66 
1973 09 34.36  19.41  26.88 
1973 10 36.90  21.34  29.12 
1973 11 35.34  24.43  29.88 
1973 12 36.00  24.24  30.12 
1974 01 33.47  24.51  28.99 
1974 02 33.63  24.20  28.91 
1974 03 31.70  23.72  27.71 
1974 04 33.07  21.67  27.37 
1974 05 30.91  16.66  23.78 
1974 06 28.38  11.32  19.84 
1974 07 29.22  10.32  19.77 
1974 08 31.89  14.60  23.24 
1974 09 33.80  17.93  25.86 
1974 10 35.93  20.96  28.45 
1974 11 36.71  23.80  30.25 
1974 12 36.77  24.76  30.76 
1975 01 35.71  24.40  30.05 
1975 02 32.68  23.60  28.14 
1975 03 33.20  23.53  28.36 
1975 04 32.25  21.58  26.91 
1975 05 32.06 -99.99 -99.99 
1975 06 29.68  14.77  22.22 
1975 07 30.81  15.47  23.14 
1975 08 31.74  15.92  23.83 
1975 09 34.09  20.20  27.15 
1975 10 36.34  22.64  29.49 
1975 11 37.89  23.91  30.90 
1975 12 34.20  24.21  29.20 
1976 01 33.41  23.61  28.51 
1976 02 32.78  24.12  28.45 
1976 03 32.78  23.34  28.06 
1976 04 99.99  20.80 -99.99 
