1971 02 -7.28 -19.20 -13.24 
1971 03 -2.82 -16.40  -9.60 
1971 04  8.60  -3.77   2.41 
1971 05 19.99   4.19  12.09 
1971 06 21.32   8.75  15.03 
1971 07 21.77   9.16  15.46 
1971 08 26.92  10.89  18.90 
1971 09 17.61   3.61  10.61 
1971 10  9.55  -2.29   3.63 
1971 11  -.97 -10.22  -5.59 
1971 12 11.81 -23.77 -17.79 
1972 01 16.23 -29.78 -23.00 
1972 02 13.97 -26.66 -20.31 
1972 03 -2.44 -13.54  -7.99 
1972 04  9.31  -2.97   3.17 
1972 05 19.42   5.66  12.54 
1972 06 23.58   9.29  16.43 
1972 07 21.36   8.38  14.87 
1972 08 26.89  10.10  18.49 
1972 09 13.86    . 6   6.96 
1972 10  7.23  -5.12   1.05 
1972 11 -2.65  -9.33  -5.99 
1972 12 13.69 -25.02 -19.35 
1973 01 -6.85 -18.42 -12.63 
1973 02 -7.77 -20.00 -13.88 
1973 03  4.32  -6.60  -1.13 
1973 04  5.93  -4.48    .72 
1973 05 16.49   3.07   9.78 
1973 06 21.21   8.35  14.78 
1973 07 23.31  10.27  16.79 
1973 08 24.95  10.39  17.67 
1973 09 17.37   3.54  10.45 
1973 10 12.47  -1.67   5.40 
1973 11 -7.46 -17.95 -12.70 
1973 12 11.24 -19.20 -15.22 
1974 01 16.57 -28.28 -22.42 
1974 02 -7.85 -20.98 -14.41 
1974 03 -6.90 -19.45 -13.17 
1974 04  8.05  -5.33   1.36 
1974 05 11.97   1.14   6.55 
1974 06 23.29   8.50  15.89 
1974 07 25.99  12.25  19.11 
1974 08 19.78   8.41  14.09 
1974 09 14.08   2.18   8.13 
1974 10 13.53  -1.74   5.89 
1974 11  1.70  -8.47  -3.38 
1974 12 -2.89 -11.90  -7.39 
1975 01 -9.27 -20.57 -14.92 
1975 02 10.67 -22.43 -16.54 
1975 03 -5.68 -16.45 -11.07 
1975 04  3.31  -5.71  -1.20 
1975 05 16.11   2.81   9.46 
1975 06 20.78   8.33  14.55 
1975 07 27.69  12.72  20.20 
1975 08 20.11   8.29  14.20 
1975 09 16.15   3.93  10.04 
1975 10 10.71  -2.24   4.23 
1975 11  2.01  -9.85  -3.92 
1975 12 -7.42 -20.55 -13.98 
1976 01 10.10 -21.25 -15.68 
1976 02 -5.73 -16.27 -11.00 
1976 03 -3.41 -17.12 -10.26 
1976 04 10.83   -.78   5.02 
1976 05 19.76   3.95  11.85 
1976 06 20.75   9.93  15.34 
1976 07 24.61  11.58  18.09 
1976 08 24.17   9.53  16.85 
1976 09 20.60   3.30  11.95 
1976 10  7.24  -4.88   1.17 
1976 12 -8.53 -21.93 -15.23 
1977 01 14.07 -27.06 -20.56 
1977 02 -1.04 -13.41  -7.22 
1977 03  3.46 -10.75  -3.64 
1977 04 16.24  -1.31   7.46 
1977 05 22.12   6.04  14.08 
1977 06 23.31   8.81  16.06 
1977 07 24.37   9.64  17.00 
1977 08 20.32   5.49  12.90 
1977 09 15.78   4.06   9.92 
1977 10 12.68  -2.16   5.26 
1977 11  -.71 -11.64  -6.17 
1977 12 12.57 -23.84 -18.20 
1978 01 15.97 -28.54 -22.25 
