1973 01 -4.59 -15.11  -9.85 
1973 02 -4.14 -15.72  -9.93 
1973 03  3.16  -7.63  -2.23 
1973 04  5.86  -2.65   1.60 
1973 05 11.77   3.09   7.43 
1973 06 23.39  11.22  17.30 
1973 07 26.90  14.74  20.82 
1973 08 23.22  12.55  17.88 
1973 09 17.50   5.63  11.56 
1973 10 11.16    .46   5.81 
1973 11  1.99  -5.39  -1.70 
1973 12   .56  -9.79  -4.61 
1974 01 -7.10 -99.99 -99.99 
1974 02 -5.91 -17.49 -11.70 
1974 07 23.32 -99.99 -99.99 
1974 08 23.47  11.30  17.38 
1974 09 17.14   4.00  10.57 
1974 10  9.43  -1.35   4.04 
1974 11  3.63  -3.12    .25 
1974 12 -1.33 -11.11  -6.22 
1975 01 -6.20 -16.91 -11.55 
1975 02 -6.21 -16.62 -11.41 
1975 03   .93 -10.06  -4.56 
1975 04  5.05  -5.86   -.40 
1975 05 16.20   2.75   9.47 
1975 06 22.37   9.56  15.96 
1975 07 25.85  14.25  20.04 
1975 08 22.49  10.87  16.68 
1975 09 17.91   7.21  12.56 
1975 10 11.52   1.04   6.28 
1975 11  4.90  -3.53    .68 
1975 12 -5.00 -16.53 -10.76 
1976 01 -7.14 -99.99 -99.99 
1976 03   . 3 -11.57  -5.77 
1976 04  6.48  -3.21   1.63 
1976 05 14.22   2.97   8.59 
1976 09 16.48 -99.99 -99.99 
1976 10  9.64 -99.99 -99.99 
1976 11   .66  -5.81  -2.57 
1976 12 -6.16 -18.33 -12.24 
1977 01 -7.76 -19.04 -13.40 
1977 02 -5.26 -15.92 -10.59 
1977 03  3.49  -9.83  -3.17 
1977 04  7.35  -4.23   1.55 
1977 05 15.99   2.80   9.39 
1977 06 17.42   7.90  12.66 
1977 07 24.38  12.13  18.25 
1977 08 23.53  10.70  17.11 
1977 09 16.39   5.69  11.04 
1977 10 10.31   2.16   6.23 
1977 11  5.51  -3.97    .77 
1977 12 -3.80 -12.18  -7.99 
1978 01 -7.99 -17.34 -12.66 
1978 02 -5.09 -14.91 -10.00 
1978 03 -1.56 -12.73  -7.14 
1978 04  4.25  -4.65   -.20 
1978 05 16.69   2.13   9.41 
1978 06 20.53   9.38  14.95 
1978 07 23.93  11.79  17.86 
1978 08 24.42  10.58  17.50 
1978 09 15.85   3.13   9.49 
1978 10  9.97    .69   5.33 
1978 11  3.35  -7.00  -1.82 
1978 12 -3.82 -13.03  -8.42 
1979 01 -4.81 -13.29  -9.05 
1979 02 -8.29 -16.57 -12.43 
1979 03  3.74  -4.92   -.59 
1979 04 99.99  -1.93 -99.99 
1979 05 15.00   4.94   9.97 
1979 06 22.37   9.53  15.95 
1979 07 25.40  13.61  19.50 
1979 08 21.48  11.60  16.54 
1979 09 18.40   5.77  12.08 
1979 10 10.85   2.76   6.80 
1979 11  5.38  -2.38   1.50 
1979 12 -1.88 -10.93  -6.40 
1980 01 -5.13 -15.89 -10.51 
1980 02 -5.41 -17.20 -11.31 
1980 03   .47 -11.13  -5.33 
1980 04  7.85  -2.28   2.78 
1980 05 13.57   2.02   7.79 
1980 07 22.67  11.34  17.00 
1980 10  8.35   -.41   3.97 
1980 11  2.19  -4.04   -.92 
1980 12 -7.19 -16.84 -12.01 
1981 01 -8.79 -20.63 -14.70 
1981 02  1.73  -9.57  -3.91 
1981 03  2.25  -7.66  -2.70 
