1957 01  8.93  -1.03   3.95 
1957 02 13.89   2.46   8.17 
1957 03 17.45   6.74  12.09 
1957 04 22.67   8.53  15.60 
1957 05 26.74  12.84  19.79 
1957 06 35.33  19.20  27.26 
1957 07 39.71  21.13  30.41 
1957 08 40.77  20.97  30.87 
1957 09 35.68  17.41  26.55 
1957 10 29.35  12.16  20.75 
1957 11 18.53   7.10  12.81 
1957 12 11.87   3.48   7.67 
1958 01 10.29   3.68   6.98 
1958 02 13.93   1.86   7.89 
1958 03 18.03   6.65  12.34 
1958 04 24.63   8.63  16.62 
1958 05 30.65  13.81  22.23 
1958 06 33.90  16.96  25.43 
1958 07 38.09  20.71  29.40 
1958 08 39.87  20.94  30.40 
1958 09 34.30  16.12  25.21 
1958 10 29.23  10.45  19.84 
1958 11 21.10   6.20  13.65 
1958 12 12.23   3.52   7.87 
1959 01 13.03   3.87   8.45 
1959 02  8.64  -2.86   2.89 
1959 03 16.84   4.55  10.69 
1959 04 24.57   8.60  16.58 
1959 05 29.81  13.26  21.53 
1959 06 33.87  15.73  24.80 
1959 07 38.45  21.06  29.75 
1959 08 38.13  20.90  29.51 
1959 09 32.97  14.93  23.95 
1975 01 10.27    .80   5.53 
1975 02 10.62   2.02   6.32 
1975 03 18.93   3.54  11.23 
1975 04 24.82   9.59  17.20 
1975 05 27.78  13.10  20.44 
1975 06 34.31  17.53  25.92 
1975 07 38.77  21.16  29.96 
1975 08 38.32  19.90  29.11 
1975 09 34.16  16.50  25.33 
1975 10 26.85  12.68  19.76 
1975 11 18.61   4.57  11.59 
1975 12 10.46    . 5   5.25 
