1971 06 99.99   8.62 -99.99 
1971 07 23.42   8.10  15.76 
1971 08 24.34   9.97  17.16 
1971 09 30.10  12.56  21.33 
1971 10 99.99  16.12 -99.99 
1971 11 35.45  19.18  27.31 
1971 12 41.22  23.26  32.24 
1972 01 39.99  23.06  31.52 
1972 02 39.82 -99.99 -99.99 
1972 03 39.12 -99.99 -99.99 
1972 04 33.77  17.20  25.48 
1972 05 29.04  12.79  20.91 
1972 06 26.08  11.06  18.57 
1972 07 23.15   9.35  16.25 
1972 08 25.17  10.83  18.00 
1972 09 32.04  15.79  23.91 
1972 10 35.62  17.62  26.62 
1972 11 39.25  23.11  31.18 
1972 12 41.56  25.95  33.75 
1973 01 38.73  25.39  32.05 
1973 02 39.79  24.70  32.24 
1973 03 37.56  23.24  30.40 
1973 05 27.75  13.62  20.68 
1973 06 22.59  11.19  16.89 
1973 07 25.23  13.46  19.34 
1973 08 25.04 -99.99 -99.99 
1973 09 30.00  12.62  21.31 
1973 10 99.99  17.56 -99.99 
1974 01 38.22  24.69  31.45 
1974 02 36.93  23.48  30.21 
1974 03 37.63  22.66  30.14 
1974 04 29.77  16.98  23.37 
1974 05 26.19  12.86  19.52 
1974 06 23.56 -99.99 -99.99 
1974 07 24.67   9.55  17.11 
1974 08 26.10  12.16  19.13 
1974 09 30.19  14.96  22.57 
1974 10 33.75  17.56  25.66 
1974 11 37.40  20.20  28.80 
1974 12 38.72 -99.99 -99.99 
1975 01 41.58 -99.99 -99.99 
1975 02 36.56  23.32  29.94 
1975 03 36.16  23.64  29.90 
1975 04 31.81  18.08  24.94 
1975 05 29.11  12.58  20.84 
1975 06 23.84   8.93  16.39 
1975 07 24.51  10.41  17.45 
1975 08 26.30   9.35  17.83 
1975 09 31.57  14.79  23.18 
1975 10 30.18  15.54  22.86 
1975 11 36.81  20.99  28.90 
1975 12 99.99  22.28 -99.99 
1976 01 38.93  24.78  31.85 
1976 02 38.93  24.16  31.55 
1976 04 32.34  16.50  24.42 
1976 05 28.20  12.31  20.25 
1976 06 24.40   8.67  16.53 
1976 07 24.71   8.76  16.73 
1976 08 27.54  10.61  19.07 
1976 09 30.62  12.04  21.33 
1976 10 32.50  16.35  24.42 
1976 11 36.12  18.16  27.14 
1976 12 41.47  24.85  33.16 
1977 01 41.53  24.90  33.21 
1977 02 42.69  26.65  34.66 
1977 03 37.11  22.79  29.95 
1977 04 33.07  18.81  25.93 
1977 05 27.75  12.21  19.98 
1977 06 24.15  10.29  17.21 
1977 07 24.99   8.64  16.81 
1977 08 28.82  10.85  19.83 
1977 09 29.73  12.71  21.22 
1977 10 35.99  18.69  27.34 
1977 11 38.89  22.05  30.47 
1977 12 39.61  24.99  32.30 
1978 01 39.74  25.49  32.61 
1978 02 37.25  24.09  30.67 
1978 03 36.89  23.09  29.99 
1978 04 34.45  19.11  26.78 
1978 05 26.39  14.29  20.34 
1978 06 22.68   9.93  16.31 
1978 07 21.81   8.13  14.96 
1978 08 23.20  11.30  17.25 
1978 09 27.49  11.36  19.42 
1978 10 35.18  18.62  26.91 
1978 11 37.52  20.74  29.13 
1978 12 39.14  22.97  31.05 
1979 01 42.54  25.95  34.24 
1979 02 39.16  24.50  31.83 
1979 03 37.06  23.28  30.17 
1979 04 33.07  20.11  26.59 
1979 05 24.12  12.14  18.13 
1979 06 24.81  10.08  17.44 
1979 07 24.46   7.79  16.12 
1979 09 28.93  13.16  21.04 
1979 10 36.12  17.74  26.93 
1979 11 40.11  23.33  31.72 
1979 12 40.21  24.45  32.33 
1980 01 39.20  25.67  32.43 
1980 02 35.95  23.89  29.92 
1980 06 22.83  10.96  16.89 
1980 07 22.68   8.93  15.80 
1980 08 27.72  11.46  19.59 
1980 09 34.29  16.48  25.38 
1980 10 33.70  15.65  24.67 
1980 11 38.70  20.97  29.83 
1980 12 41.21  24.75  32.98 
1981 01 41.47  26.85  34.16 
1981 02 36.09  23.86  29.98 
1981 03 36.41  21.74  29.07 
1981 04 36.66  20.40  28.53 
1981 05 28.28  13.68  20.98 
1981 06 23.25   8.50  15.87 
1981 07 23.06   7.63  15.34 
1981 08 28.04  11.61  19.82 
1981 09 34.28  15.35  24.81 
1981 10 36.89 -99.99 -99.99 
1981 11 36.65  19.02  27.83 
1981 12 41.35  24.22  32.78 
1982 01 38.46  24.08  31.27 
1982 02 37.18  23.79  30.48 
1982 03 35.04  20.12  27.58 
1982 04 33.71  16.89  25.30 
1982 05 28.57  12.63  20.60 
1982 06 23.80   8.55  16.17 
1982 07 24.09   8.17  16.13 
1982 08 29.30  11.22  20.26 
1982 09 30.71  15.24  22.97 
1982 10 36.55  19.54  28.04 
1982 11 38.46  21.77  30.11 
1983 02 41.06  25.14  33.09 
1983 06 26.74  11.10  18.92 
1983 07 23.16   7.62  15.39 
1983 08 28.65  10.56  19.60 
1983 09 33.38  15.70  24.54 
1983 10 36.36  18.21  27.29 
1983 11 38.93  22.18  30.56 
1983 12 39.14  23.70  31.42 
1984 01 39.98  24.89  32.43 
1984 02 40.95  25.45  33.20 
1984 03 34.66  20.84  27.75 
1984 04 34.16  18.26  26.21 
1984 05 28.43  16.46  22.45 
1984 06 25.96   9.10  17.52 
1984 07 21.57   8.60  15.08 
