1971 06 24.13   9.42  16.77 
1971 07 26.19   8.87  17.53 
1971 08 27.31  11.99  19.65 
1971 10 35.66 -99.99 -99.99 
1971 11 36.02  19.49  27.75 
1971 12 41.36  23.64  32.50 
1972 01 40.38  23.15  31.76 
1972 02 40.46  23.77  32.11 
1972 03 39.58  20.83  30.20 
1972 04 35.74  17.67  26.70 
1972 05 30.71  14.27  22.49 
1972 06 27.54  12.83  20.18 
1972 07 25.44  11.50  18.47 
1972 08 27.11  12.60  19.85 
1972 09 34.18  16.06  25.12 
1972 10 37.41  17.74  27.57 
1972 11 40.91  22.52  31.72 
1972 12 42.83  25.12  33.97 
1973 01 38.88  25.63  32.25 
1973 03 39.34  24.77  32.05 
1973 04 35.54  21.07  28.30 
1973 05 31.23  17.95  24.59 
1973 06 25.31  13.89  19.60 
1973 07 28.94  15.50  22.22 
1973 08 28.26  15.26  21.76 
1973 09 31.75  13.86  22.80 
1973 10 36.73  18.65  27.68 
1973 12 39.36  24.48  31.92 
1974 01 37.53 -99.99 -99.99 
1974 02 37.90  23.86  30.88 
1974 03 99.99  23.18 -99.99 
1974 04 31.44  17.95  24.70 
1974 05 28.38 -99.99 -99.99 
1974 07 26.86  10.84  18.85 
1974 08 29.06  13.68  21.37 
1974 09 99.99  15.82 -99.99 
1974 10 99.99  18.49 -99.99 
1974 11 99.99  19.45 -99.99 
1975 01 99.99  24.93 -99.99 
1975 02 99.99  25.01 -99.99 
1975 03 99.99  24.56 -99.99 
1975 05 99.99  15.12 -99.99 
1975 06 99.99  11.59 -99.99 
1975 07 25.94  13.20  19.57 
1975 08 28.54  11.52  20.03 
1975 09 33.43  16.79  25.12 
1975 10 32.75  17.36  25.06 
1975 11 39.27  21.42  30.34 
1975 12 37.66  23.67  30.66 
1976 01 38.11  24.81  31.46 
1976 02 38.96  24.02  31.49 
1976 03 36.09  22.07  29.08 
1976 04 35.48  20.85  28.16 
1976 05 30.41  15.40  22.90 
1976 06 26.77  11.41  19.09 
1976 07 27.05   9.92  18.48 
1976 08 29.71  11.40  20.55 
1976 09 32.43  13.40  22.91 
1976 10 99.99  16.65 -99.99 
1976 11 37.03  18.04  27.54 
1976 12 42.28  23.99  33.13 
1977 01 41.43  24.26  32.84 
1977 02 42.36  25.47  33.91 
1977 03 37.28  23.50  30.39 
1977 04 34.75  19.94  27.34 
1977 05 29.67  15.17  22.42 
1977 06 25.85  12.35  19.10 
1977 07 27.10   9.64  18.37 
1977 08 30.77  11.71  21.24 
1977 09 31.83  13.74  22.78 
1977 10 37.59  19.20  28.40 
1977 11 40.02  22.24  31.13 
1977 12 41.16  25.22  33.18 
1978 01 40.24  26.22  33.23 
1978 02 37.98  25.15  31.56 
1978 04 36.02 -99.99 -99.99 
1978 05 27.45  14.90  21.17 
1978 06 24.93  12.08  18.50 
1978 07 23.81  10.07  16.93 
1978 08 25.89 -99.99 -99.99 
1978 09 99.99  12.76 -99.99 
1978 10 36.84 -99.99 -99.99 
1978 11 39.45  21.51  30.48 
1979 02 40.00  24.06  32.03 
1979 03 38.20  23.50  30.85 
1979 04 35.18  19.08  27.13 
1979 05 26.35  13.15  19.75 
1979 06 27.32   9.89  18.61 
1979 07 26.85   7.59  17.22 
1979 08 28.08  12.09  20.08 
1979 09 31.93  13.57  22.75 
1979 10 37.71  15.39  26.55 
1979 11 41.12  20.10  30.61 
1980 01 38.65  22.80  30.72 
1981 02 99.99  24.85 -99.99 
1981 07 25.23  10.44  17.83 
1981 09 34.89  16.33  25.61 
1982 02 36.49  24.86  30.67 
1982 03 35.89  22.99  29.43 
