1970 06 18.14   8.72  13.43 
1970 07 18.83   4.82  11.82 
1970 08 19.39   5.96  12.67 
1970 09 21.28   7.11  14.19 
1970 10 27.55  11.14  19.34 
1970 11 30.92  13.47  22.19 
1970 12 35.57 -99.99 -99.99 
1971 01 35.31 -99.99 -99.99 
1971 02 34.74 -99.99 -99.99 
1971 03 31.81  18.01  24.91 
1971 04 26.61  11.94  19.27 
1971 05 22.23   8.56  15.39 
1971 06 19.25   6.52  12.88 
1971 07 18.62   4.78  11.70 
1971 08 99.99   6.04 -99.99 
1971 09 21.48   6.79  14.13 
1971 10 23.96   8.76  16.36 
1971 11 26.61  10.85  18.73 
1971 12 33.77  15.96  24.86 
1972 01 36.89  19.07  27.98 
1972 02 37.65  20.32  28.98 
1972 03 36.12  17.34  26.73 
1972 04 29.65  10.89  20.27 
1972 05 26.08   9.31  17.69 
1972 06 20.14   7.65  13.89 
1972 07 17.31   5.96  11.63 
1972 08 18.45   6.40  12.42 
1972 09 23.88   8.18  16.03 
1972 10 26.95   9.92  18.43 
1972 11 32.52  14.78  23.65 
1972 12 38.75  18.74  28.75 
1973 01 37.34  19.82  28.58 
1973 02 36.50  18.32  27.41 
1973 10 99.99   9.67 -99.99 
1973 11 30.92  14.16  22.54 
1973 12 34.81  15.75  25.28 
1974 01 38.09  20.37  29.23 
1974 02 34.59  18.67  26.63 
1974 03 33.84  19.58  26.71 
1974 04 24.66  13.07  18.86 
1974 05 21.46  10.08  15.77 
1974 06 18.49   6.70  12.59 
1974 07 17.41   7.28  12.34 
1974 08 19.36   6.81  13.08 
1974 09 22.80   7.85  15.32 
1975 01 36.22  17.37  26.80 
1975 02 35.71  21.20  28.45 
1975 03 32.03 -99.99 -99.99 
1975 04 26.39 -99.99 -99.99 
1975 05 23.16 -99.99 -99.99 
1975 06 19.83 -99.99 -99.99 
1975 07 18.37 -99.99 -99.99 
1975 08 19.11   6.16  12.63 
1975 09 22.19   6.93  14.56 
1975 10 24.41   9.64  17.02 
1975 11 30.27  12.33  21.30 
1975 12 34.73  16.52  25.62 
