1973 08 26.45 -99.99 -99.99 
1973 09 18.62 -99.99 -99.99 
1973 12 -2.33 -11.37  -6.85 
1974 01 -6.89 -17.15 -12.02 
1974 02 -6.74 -18.79 -12.76 
1974 03   .11 -10.44  -5.16 
1974 04  7.58  -2.36   2.60 
1974 05 14.14   3.15   8.64 
1974 06 22.58   9.71  16.14 
1974 07 25.34  14.60  19.97 
1974 08 24.68  12.56  18.62 
1974 09 17.40   6.80  12.10 
1974 10  9.60   -.98   4.31 
1974 11  3.56  -3.64    .-4 
1974 12 -1.24  -9.77  -5.50 
1975 01 -6.24 -15.49 -10.86 
1975 02 -4.94 -16.20 -10.58 
1975 03  -.63 -10.31  -5.47 
1975 04  6.18  -2.54   1.82 
1975 05 99.99   7.38 -99.99 
1975 06 99.99  11.34 -99.99 
1975 07 27.90  14.87  21.38 
1975 08 25.64  12.66  19.15 
1975 09 19.00   7.40  13.20 
1975 10 12.78   2.73   7.75 
1975 11  6.79  -1.29   2.75 
1975 12 99.99 -16.20 -99.99 
1976 01 -7.71 -99.99 -99.99 
1976 02 -2.29 -15.06  -8.67 
1976 03   .16 -10.17  -5.00 
1976 04 11.48   -.22   5.62 
1976 05 17.75   5.29  11.52 
1976 06 24.74  12.36  18.54 
1976 07 22.99  12.91  17.95 
1976 09 17.24   6.99  12.11 
1976 10  9.02    .22   4.62 
1976 11  1.91  -4.98  -1.54 
1976 12 -7.75 -18.68 -13.21 
1977 01 -9.82 -20.12 -14.97 
1977 02 -5.53 -13.38  -9.45 
1977 03  3.94  -4.94   -.50 
1977 04 10.18  -1.37   4.41 
1977 05 21.20   6.51  13.85 
1977 06 21.36  11.14  16.25 
1977 07 25.11  13.08  19.09 
1977 08 22.87  11.56  17.21 
1977 09 16.76   8.14  12.45 
1977 10 12.44   2.17   7.30 
1977 11  4.81  -2.84    .98 
1977 12 -4.75 -12.00  -8.37 
1978 01 -8.45 -17.07 -12.76 
1978 02 -5.91 -18.02 -11.96 
1978 03  -.73 -11.66  -6.19 
1978 04  7.25  -1.97   2.64 
1978 05 21.48   7.60  14.54 
1978 06 22.90  11.35  17.12 
1978 07 25.96  13.07  19.51 
1978 08 24.33  12.37  18.35 
1978 09 17.00   5.30  11.15 
1978 10 10.52   1.54   6.03 
1978 11  4.23  -6.05   -.91 
1978 12 -4.15 -13.93  -9.04 
1979 01 99.99 -15.22 -99.99 
1979 02 -9.26 -18.49 -13.87 
1979 03  3.36  -5.09   -.86 
1979 04 10.29   1.26   5.77 
1979 05 99.99   7.41 -99.99 
1979 06 99.99  11.15 -99.99 
1979 07 99.99  14.16 -99.99 
1979 08 99.99  12.51 -99.99 
1979 09 18.85   7.02  12.93 
1979 10 12.03   3.51   7.77 
1979 11  5.58  -1.83   1.87 
1979 12 -2.34 -10.22  -6.29 
1980 01 -5.62 -14.98 -10.29 
1980 02 -5.49 -14.02  -9.75 
1980 03  1.10  -8.57  -3.73 
1980 04 10.42   1.63   6.02 
1980 05 18.69   5.35  12.02 
1980 06 21.62   9.85  15.74 
1980 07 25.10  13.33  19.21 
1980 08 24.52  14.31  19.41 
1980 09 17.52   6.40  11.96 
1980 10  8.68    .79   4.73 
1980 11  1.61  -5.52  -1.95 
1980 12 -8.07 -18.18 -13.12 
1981 01 10.39 -21.18 -15.78 
1981 02   .56  -9.35  -4.39 
1981 03  2.24  -4.85  -1.30 
1981 04 12.16    . 9   6.12 
1981 05 17.52   6.94  12.23 
1981 06 22.87  11.71  17.29 
1981 07 25.39  14.37  19.87 
1981 08 23.35  13.18  18.26 
1981 09 17.50   9.05  13.27 
1981 10  9.45    .47   4.96 
1981 11  3.90  -2.33    .78 
1981 12 -1.95  -8.74  -5.34 
1982 01 11.63 -23.84 -17.73 
1982 02 -6.71 -16.83 -11.77 
1982 03   . 0 -10.06  -5.03 
1982 04  7.68  -2.97   2.35 
1982 05 20.20   7.06  13.63 
1982 06 22.07  10.68  16.37 
1982 07 26.31  12.45  19.37 
1982 08 22.43  10.60  16.51 
1982 09 18.37   9.17  13.77 
1982 10 13.02   2.98   8.00 
1982 11  5.68  -2.30   1.69 
1982 12  -.84  -8.87  -4.85 
1983 01 -5.76 -15.03 -10.39 
1983 02 -3.00 -12.64  -7.82 
1983 03  1.85  -6.52  -2.33 
1983 04  8.32    .20   4.25 
1983 05 13.97   4.39   9.18 
1983 06 24.78  10.73  17.75 
1983 07 27.35  15.03  21.19 
1983 08 26.32  12.63  19.47 
1983 09 22.03   8.20  15.11 
1983 10 11.71   1.65   6.68 
1983 11  3.31  -1.39    .96 
1983 12 -6.32 -14.26 -10.29 
1984 01 -9.68 -19.03 -14.35 
1984 02  -.44  -9.43  -4.93 
1984 03 -2.77 -13.03  -7.89 
1984 04 11.28 -99.99 -99.99 
1984 05 15.52   5.37  10.44 
1984 06 23.35  11.20  17.27 
1984 07 25.34  14.60  19.97 
1984 08 26.23  14.58  20.40 
1984 09 17.86   6.30  12.08 
1984 10 13.20   1.72   7.46 
1984 11  4.59  -2.43   1.08 
1984 12 -2.48 -10.97  -6.72 
1985 01 -9.64 -19.29 -14.47 
1985 02 -3.70 -13.14  -8.42 
1985 03   .85  -8.79  -3.97 
1985 04  9.27   -.93   4.17 
1985 05 18.50   5.46  11.98 
1985 06 21.22  10.50  15.86 
1985 07 25.07  12.87  18.96 
1985 08 24.26  11.66  17.95 
1985 09 20.83   8.47  14.65 
1985 10 12.54   2.70   7.62 
1985 11  2.79  -5.41  -1.31 
1985 12 -5.73 -16.37 -11.05 
1986 01 -6.07 -18.27 -12.17 
1986 02 -6.05 -17.50 -11.77 
1986 05 18.70 -99.99 -99.99 
1986 06 21.17   7.89  14.53 
1986 07 23.98  11.95  17.96 
1986 08 22.52  10.66  16.59 
1986 09 17.03   6.21  11.62 
1986 10 11.26   1.68   6.47 
1986 11  2.13  -6.90  -2.38 
1986 12 -2.46 -11.97  -7.21 
1987 01 -6.61 -16.16 -11.38 
1987 02 -5.72 -17.26 -11.49 
1987 04 14.45   2.92   8.68 
1987 05 17.96   5.50  11.73 
1987 06 23.22  12.70  17.95 
1987 07 25.62  15.43  20.52 
1987 08 24.53  11.69  18.11 
1987 09 18.70   7.37  13.03 
1987 10 11.03    .42   5.72 
1987 11  3.62  -5.78  -1.08 
1987 12 -2.00 -10.66  -6.33 
1988 01 -5.27 -17.60 -11.43 
1988 02 -5.10 -16.24 -10.67 
1988 03   .27  -9.88  -4.80 
1988 04  9.05   1.00   5.02 
1988 05 20.62   8.25  14.43 
1988 06 23.07  10.78  16.92 
1988 07 26.85  15.32  21.08 
1988 08 24.83  13.92  19.37 
1988 09 18.41   6.69  12.55 
1988 10  8.92   1.43   5.17 
1988 12 -4.25 -14.55  -9.39 
1989 01 -4.90 -17.78 -11.34 
1989 02 -5.96 -18.07 -12.01 
1989 07 26.83  13.31  20.07 
1989 08 25.25  12.60  18.92 
1989 09 99.99   8.18 -99.99 
1989 10 99.99   2.19 -99.99 
1989 11  1.78  -6.55  -2.38 
1989 12 13.00 -25.53 -19.26 
1990 01 -1.52 -11.63  -6.57 
1990 02 -4.05 -17.45 -10.75 
1990 03 99.99 -10.12 -99.99 
1990 04 10.78   -.13   5.32 
1990 05 17.37   3.88  10.62 
1990 06 22.33  10.85  16.59 
1990 07 25.89  13.66  19.77 
1990 08 25.43  13.29  19.36 
1990 09 18.87   8.29  13.58 
1990 10 11.45   3.16   7.30 
1990 11  4.13  -2.83    .65 
1990 12 -2.45 -11.79  -7.12 
1991 01 -7.42 -18.53 -12.97 
