1969 01 10.68 -17.37 -14.03 
1969 02 13.48 -20.67 -17.07 
1969 03 15.32 -23.99 -19.65 
1969 04 12.66 -20.61 -16.63 
1969 05 -1.28  -6.66  -3.96 
1969 06  2.13  -1.27    .43 
1969 07  7.40   3.66   5.53 
1969 08  5.59   1.85   3.72 
1969 09  4.03    .35   2.19 
1969 10  -.30  -4.55  -2.42 
1969 11 -8.43 -14.01 -11.22 
1969 12 -6.99 -14.38 -10.68 
1970 01 -9.85 -18.42 -14.14 
1970 02 11.90 -18.95 -15.42 
1970 03 -8.27 -14.74 -11.50 
1970 04 -9.18 -15.79 -12.48 
1970 05  -.58  -5.79  -3.18 
1970 06  2.96   -.52   1.21 
1970 07  6.62   2.95   4.78 
1970 08  5.74   2.13   3.93 
1970 09  1.29  -3.24   -.97 
1970 10 -2.84  -7.08  -4.96 
1970 11 -9.76 -15.00 -12.38 
1970 12 10.56 -17.69 -14.12 
1971 01 16.39 -23.93 -20.16 
1971 02 -7.61 -14.37 -10.99 
1971 03 12.13 -18.74 -15.43 
1971 04 -7.33 -14.58 -10.95 
1971 05 -1.13  -5.49  -3.31 
1971 06  5.15   1.24   3.19 
1971 07  7.75   4.17   5.96 
1971 08  5.41   2.33   3.87 
1971 09  1.38  -1.60   -.11 
1971 10 -5.56 -10.45  -8.00 
1971 11 14.39 -19.60 -16.99 
1971 12 -8.28 -13.60 -10.94 
1972 01  -.99  -7.55  -4.27 
1972 02 -7.00 -15.39 -11.19 
1972 03 -7.19 -13.46 -10.32 
1972 04 -8.21 -14.91 -11.56 
1972 05  -.70  -4.55  -2.62 
1972 06  5.60   1.52   3.56 
1972 07  7.04   3.09   5.06 
1972 08  6.55   3.04   4.79 
1972 09  3.46    .10   1.78 
1972 10 -2.13  -6.67  -4.40 
1972 11 -2.59  -7.61  -5.10 
1972 12 -5.63 -13.32  -9.47 
1973 01 -5.35 -11.90  -8.62 
1973 02 12.82 -19.99 -16.40 
1973 03 11.51 -19.00 -15.25 
1973 04 -6.38 -12.67  -9.52 
1973 05 -1.59  -6.35  -3.97 
1973 06  3.93    .30   2.11 
1973 07  7.03   3.42   5.22 
1973 08  4.16   1.15   2.65 
1973 09  1.49  -2.65   -.58 
1973 10 -4.94 -10.26  -7.60 
1973 11 10.73 -17.00 -13.86 
1973 12 11.85 -18.79 -15.32 
1974 01 -4.07 -10.55  -7.31 
1974 02 -7.23 -13.94 -10.58 
1974 03 -3.25 -12.15  -7.70 
1974 04 -7.68 -15.23 -11.45 
1974 05 -1.50  -6.65  -4.07 
1974 06  4.12   1.09   2.60 
1974 07  8.22   4.92   6.57 
