1972 12 12.55 -23.33 -17.94 
1973 01 -6.67 -16.37 -11.52 
1973 02 -6.53 -16.62 -11.57 
1973 03  5.61  -5.36    .12 
1973 04  7.39  -3.84   1.77 
1973 05 16.96   3.42  10.19 
1973 06 21.97   8.71  15.34 
1973 07 23.68  10.44  17.06 
1973 08 26.73  11.15  18.93 
1973 09 16.92   3.71  10.31 
1973 10 12.93   -.68   6.12 
1973 11 -7.58 -16.35 -11.96 
1973 12 11.70 -20.00 -15.85 
1974 01 15.89 -27.84 -21.86 
1974 02 -8.62 -20.06 -14.34 
1974 03 -6.93 -18.00 -12.46 
1974 04  6.33  -4.65    .83 
1974 05 12.32   2.02   7.17 
1974 06 23.74   8.70  16.21 
1974 07 26.41  11.46  18.93 
1974 08 19.68   8.50  14.09 
1974 09 15.17   2.35   8.76 
1974 10 13.70  -1.25   6.22 
1974 11  1.94  -8.50  -3.28 
1974 12 -2.67 -99.99 -99.99 
1975 01 -9.00 -20.68 -14.84 
1975 02 11.66 -21.73 -16.69 
1975 03 -5.77 -15.48 -10.62 
1975 04  2.71  -4.32   -.80 
1975 05 16.33   3.33   9.83 
1975 06 21.38   8.31  14.84 
1975 07 27.95  12.35  20.15 
1975 08 21.02   8.51  14.76 
1975 09 16.26   3.53   9.89 
1975 10 11.61  -1.73   4.93 
1975 11  1.67  -9.47  -3.90 
1975 12 -6.85 -18.96 -12.91 
1976 01 -9.77 -19.89 -14.83 
1976 02 -5.61 -15.77 -10.69 
1976 03 -4.44 -15.14  -9.79 
1976 04 11.14   -.32   5.41 
1976 05 20.49   3.57  12.03 
1976 06 20.71  10.27  15.49 
1976 07 24.39  11.30  17.84 
1976 08 25.71  10.12  17.91 
1976 09 21.59   4.00  12.79 
1976 10 99.99  -4.23 -99.99 
1976 11   .-6 -13.10  -6.58 
1976 12 -8.13 -20.34 -14.23 
1977 01 15.58 -27.34 -21.46 
1977 02 -1.41 -11.87  -6.64 
1977 03  3.89  -8.93  -2.52 
1977 04 16.20  -1.41   7.39 
1977 05 21.56   7.05  14.30 
1977 06 21.83   9.18  15.50 
1977 07 23.80  10.58  17.18 
1977 08 20.55   5.56  13.05 
1977 09 16.31   5.47  10.89 
1977 10 12.64  -1.13   5.75 
1977 11 -1.51 -12.60  -7.05 
1977 12 13.52 -22.92 -18.22 
1978 01 17.84 -26.77 -22.30 
1978 02 11.95 -21.94 -16.94 
1978 03 -1.04 -11.63  -6.34 
1978 04  8.72  -1.26   3.73 
1978 05 19.35   5.86  12.60 
1978 06 23.34   8.16  15.75 
1978 07 24.51   9.55  17.03 
1978 08 24.37   8.09  16.23 
1978 09 20.20   5.48  12.84 
1978 10 12.84  -1.63   5.60 
1978 11 -4.36 -15.04  -9.70 
1978 12 11.46 -22.53 -16.99 
1979 01 17.18 -27.55 -22.36 
1979 02 17.23 -26.65 -21.93 
1979 03 -3.30 -13.56  -8.43 
1979 04  1.55  -5.94  -2.19 
1979 05 13.38   1.95   7.66 
1979 06 23.64   7.72  15.67 
1979 07 27.56  11.67  19.61 
1979 08 24.55   8.06  16.30 
1979 10 10.93  -1.93   4.50 
1979 11  -.56 -12.09  -6.32 
1979 12 99.99 -15.92 -99.99 
1980 01 12.08 -99.99 -99.99 
1980 02 -8.47 -19.61 -14.04 
1980 04 99.99    .11 -99.99 
1980 05 23.15 -99.99 -99.99 
1980 06 24.00 -99.99 -99.99 
