1957 01 17.19 -99.99 -99.99 
1957 02 20.66  13.80  17.23 
1957 03 19.95  12.72  16.34 
1957 04 23.89  17.70  20.79 
1957 05 28.94  22.02  25.48 
1957 06 31.45  24.36  27.90 
1957 07 33.02  25.18  29.10 
1957 08 31.78  24.57  28.17 
1957 09 27.69  22.19  24.94 
1957 10 23.45  14.96  19.20 
1957 11 20.17  12.60  16.38 
1957 12 16.54   8.70  12.62 
1958 01 12.82 -99.99 -99.99 
1958 04 99.99  15.68 -99.99 
1958 05 28.00  20.46  24.23 
1958 06 31.95  24.02  27.98 
1958 07 31.91  25.58  28.74 
1958 08 32.33  24.94  28.63 
1958 09 30.23  23.46  26.84 
1958 10 24.91  17.45  21.18 
1958 11 20.97  13.79  17.37 
1958 12 14.69   7.81  11.25 
1959 01 14.25   5.50   9.87 
1959 02 16.28   8.24  12.26 
1959 03 19.18  11.65  15.41 
1959 04 23.41  16.77  20.09 
1959 05 29.21  22.11  25.66 
1959 06 31.14  23.79  27.46 
1959 08 32.13  25.05  28.59 
1959 09 30.35  23.49  26.92 
1959 10 26.29  19.04  22.67 
1959 11 18.41   9.57  13.99 
1959 12 16.75   8.24  12.49 
1960 01 13.91   6.43  10.17 
1960 02 99.99   5.87 -99.99 
1960 03 17.08   8.79  12.93 
1960 04 25.43  16.50  20.96 
1960 05 27.53  19.73  23.63 
1960 06 32.04  24.31  28.17 
1960 07 33.30  25.26  29.28 
1960 08 30.98  24.86  27.92 
1960 09 30.31  22.79  26.55 
1960 10 26.73  19.12  22.92 
1960 11 21.90 -99.99 -99.99 
1961 01 12.50   4.31   8.40 
1961 02 17.94   9.06  13.50 
1961 03 22.46 -99.99 -99.99 
1961 04 23.81  14.13  18.96 
1961 05 28.45  18.81  23.63 
1961 06 30.37 -99.99 -99.99 
1961 07 31.65 -99.99 -99.99 
1961 08 31.44 -99.99 -99.99 
1961 09 29.28 -99.99 -99.99 
1961 10 25.47  14.48  19.97 
1961 11 20.50  13.78  17.14 
1961 12 17.10  10.60  13.85 
1962 01 99.99   4.65 -99.99 
1962 02 20.50  12.96  16.73 
1962 03 19.35  11.95  15.65 
1962 04 23.67  17.28  20.47 
1962 05 30.71  24.19  27.45 
1962 06 31.66 -99.99 -99.99 
1962 07 33.05  25.99  29.52 
1962 08 33.20  25.94  29.57 
1962 09 31.25  24.00  27.62 
1962 10 27.12  19.85  23.48 
1962 11 19.12  11.52  15.32 
1962 12 15.53   7.04  11.28 
1963 01 12.75   5.33   9.04 
1963 02 14.41   6.70  10.55 
1963 03 22.05  15.11  18.58 
1963 04 26.74  20.04  23.39 
1963 05 29.60  23.11  26.35 
1963 06 31.76  24.95  28.35 
1963 07 31.78  24.41  28.09 
1963 08 32.43  24.53  28.48 
1963 09 30.83  23.71  27.27 
1963 10 26.95  20.19  23.57 
1963 11 19.54  13.87  16.70 
1963 12 12.24   4.21   8.22 
1964 01 13.52   5.98   9.75 
1964 02 14.51   6.87  10.69 
1964 03 19.82  12.29  16.05 
1964 04 24.94  18.35  21.64 
1964 05 29.15  21.50  25.32 
1964 06 31.59  22.53  27.06 
1964 07 31.63  25.19  28.41 
1964 08 32.57  26.25  29.41 
1964 09 30.40  22.14  26.27 
1964 10 23.83  14.48  19.15 
1964 11 21.92  14.87  18.39 
1964 12 17.29   8.24  12.76 
1965 01 17.45   7.69  12.57 
1965 02 16.70   6.10  11.40 
1965 03 19.10  11.14  15.12 
1965 04 27.35 -99.99 -99.99 
1965 05 28.10 -99.99 -99.99 
1965 06 31.05  18.70  24.88 
1965 07 31.79 -99.99 -99.99 
1965 08 31.70  23.89  27.79 
1965 09 31.02 -99.99 -99.99 
1965 10 25.39  18.42  21.90 
1965 11 22.61 -99.99 -99.99 
1965 12 17.48 -99.99 -99.99 
1966 01 13.87 -99.99 -99.99 
1966 02 15.76 -99.99 -99.99 
