1977 01 -9.59 -18.15 -13.87 
1977 02 10.78 -18.58 -14.68 
1977 03 -3.05 -13.28  -8.16 
1977 04   .50  -6.97  -3.23 
1977 05  7.63   -.99   3.32 
1977 06 13.85   4.61   9.23 
1977 07 17.67   8.89  13.28 
1977 08 15.76   6.29  11.02 
1977 09  8.10   1.39   4.74 
1977 10   .72  -4.42  -1.85 
1977 11 -2.98  -8.62  -5.80 
1977 12 -6.62 -14.53 -10.57 
1978 01 10.41 -20.68 -15.54 
1978 02 11.32 -19.18 -15.25 
1978 03 -3.38 -10.82  -7.10 
1978 04  1.40  -7.18  -2.89 
1978 05 11.36    .37   5.86 
1978 06 17.04   6.84  11.94 
1978 07 18.99   8.29  13.64 
1978 08 14.75   6.48  10.61 
1978 09  8.75   2.75   5.75 
1978 10  1.24  -5.71  -2.23 
1978 11 -4.31 -13.31  -8.81 
1978 12 14.37 -24.58 -19.47 
1979 01 14.58 -22.50 -18.54 
1979 02 -9.97 -17.60 -13.79 
1979 03 -2.97 -10.22  -6.59 
1979 04  1.17  -6.48  -2.65 
1979 05 10.25   1.40   5.82 
1979 06 17.73   7.89  12.81 
1979 07 19.79   9.97  14.88 
1979 08 16.62   8.88  12.75 
1979 09  9.34   2.35   5.85 
1979 10  -.87  -6.57  -3.72 
1979 11 -3.98  -9.87  -6.92 
1979 12 -6.55 -14.18 -10.36 
1980 01 11.77 -21.52 -16.64 
1980 02 13.12 -99.99 -99.99 
1980 03 -4.77 -99.99 -99.99 
1980 04  3.98 -99.99 -99.99 
1980 05  9.70    .58   5.14 
1980 06 20.80  10.07  15.43 
1980 07 20.60   8.79  14.69 
1980 08 16.86   7.67  12.26 
1980 09 10.59   3.05   6.82 
1980 10   .33  -5.87  -2.77 
1980 11 -8.43 -16.29 -12.36 
1980 12 10.22 -19.12 -14.67 
1981 01 -8.03 -18.84 -13.43 
1981 02 10.16 -18.48 -14.32 
1981 03 -7.97 -20.04 -14.00 
1981 04  2.50  -6.61  -2.05 
1981 05 12.78   1.36   7.07 
1981 06 13.42   4.90   9.16 
1981 07 18.82  10.12  14.46 
1981 08 14.53   7.08  10.80 
1981 09  9.50   2.81   6.15 
1981 10  3.37  -2.04    .66 
1981 11 -4.58 -11.58  -8.08 
1981 12 14.68 -23.53 -19.10 
1982 01 13.10 -23.15 -18.12 
1982 02 -4.41 -12.76  -8.58 
1982 03 -1.53  -9.12  -5.32 
1982 04  3.31  -4.83   -.76 
1982 05  8.71   1.19   4.94 
1982 06 12.21   3.39   7.80 
1982 07 19.64   9.04  14.34 
1982 08 15.45   7.03  11.24 
1982 09  9.43    .83   5.13 
1982 10  1.72  -3.47   -.87 
1982 11 -2.00  -8.72  -5.36 
1982 12 -5.84 -15.20 -10.52 
1983 01 -6.80 -15.65 -11.22 
1983 02 -7.67 -18.45 -13.06 
1983 03 -2.53 -12.55  -7.54 
1983 04  3.98  -2.32    .83 
1983 05 11.36   3.43   7.39 
1983 06 15.35   6.53  10.94 
1983 07 18.91  10.10  14.51 
1983 08 14.89   5.57  10.23 
1983 09 10.18   4.40   7.29 
1983 10  1.86  -3.59   -.86 
1983 11 -8.14 -18.51 -13.32 
1983 12 10.73 -19.39 -15.06 
1984 01 10.80 -18.62 -14.71 
1984 02 -4.09 -10.32  -7.20 
1984 03 -4.12 -13.43  -8.77 
1984 04  4.10  -4.92   -.41 
