1968 12 31.24  16.01  23.62 
1969 01 36.09  20.32  28.21 
1969 02 32.93  20.19  26.56 
1969 03 27.93 -99.99 -99.99 
1969 04 23.76  10.31  17.03 
1969 05 18.69   7.17  12.93 
1969 06 15.65   3.97   9.80 
1969 07 16.26   3.92  10.09 
1969 08 99.99   3.92 -99.99 
1969 09 17.17   4.39  10.78 
1969 10 26.04  10.82  18.43 
1969 11 27.51 -99.99 -99.99 
1969 12 31.76  13.94  22.85 
1970 01 32.34  16.23  24.28 
1970 02 33.86  17.39  25.62 
1970 04 25.13  10.53  17.83 
1970 05 18.71   4.37  11.54 
1970 06 17.67   3.57  10.62 
1970 12 31.44 -99.99 -99.99 
1971 06 16.74    .79   8.76 
1971 09 99.99   5.67 -99.99 
1972 02 99.99  15.74 -99.99 
1972 05 20.69   6.67  13.68 
1972 08 18.68   5.01  11.84 
1973 05 21.34   6.74  14.04 
1973 06 16.16   5.93  11.04 
1973 07 17.60   5.85  11.72 
1973 08 17.12   4.73  10.93 
1973 09 20.42   7.02  13.72 
1973 10 23.71  12.22  17.96 
1973 11 28.18  13.13  20.65 
1973 12 30.70  17.39  24.04 
1974 01 29.95  19.18  24.56 
1974 02 31.74  17.11  24.42 
1974 03 30.75  15.95  23.35 
1974 04 24.18  13.45  18.81 
1974 05 20.60   7.94  14.27 
1974 06 17.41   2.36   9.88 
1974 07 15.45   2.81   9.13 
1974 08 16.56   3.48  10.01 
1974 09 17.96   4.96  11.46 
1974 10 22.91   9.31  16.11 
1974 11 27.03  10.98  19.00 
1974 12 33.00  13.95  23.47 
1975 01 33.00  16.11  24.55 
1975 02 31.33  17.39  24.36 
1975 03 28.95  13.37  21.16 
1975 04 25.46   9.02  17.24 
1975 05 22.10   6.10  14.10 
1975 06 17.82   3.92  10.87 
1975 07 18.25   4.44  11.34 
1975 08 17.62   4.67  11.15 
1975 09 20.18   8.43  14.31 
1975 10 22.69   9.99  16.34 
1975 11 30.90  14.12  22.51 
1975 12 32.95  19.76  26.35 
1976 01 29.91  18.09  24.00 
1976 02 28.48  18.18  23.33 
1976 03 28.03  14.30  21.16 
1976 04 24.98   8.58  16.77 
1976 05 21.00   5.38  13.19 
1977 06 16.56   4.32  10.44 
1977 07 15.79   1.29   8.54 
1977 08 20.48   3.33  11.90 
1977 09 21.62   6.40  14.01 
1977 10 27.08  11.15  19.11 
1977 11 31.31  14.76  23.03 
1977 12 34.97  16.69  25.83 
1978 01 32.18  18.57  25.38 
1978 02 33.84  18.37  26.11 
1978 03 30.81  16.36  23.58 
1978 05 20.29   8.22  14.25 
1978 08 15.92   3.28   9.60 
1978 09 19.07   7.78  13.42 
1978 10 24.32   9.25  16.78 
1978 12 99.99  14.30 -99.99 
1979 01 36.89  20.66  28.77 
1979 02 34.72  19.40  27.06 
1979 03 99.99  16.08 -99.99 
1979 05 18.95   6.73  12.84 
1979 06 17.79   5.69  11.74 
1979 10 26.01  10.03  18.02 
1979 12 36.16  16.18  26.17 
1980 01 33.63  17.23  25.43 
1980 02 33.93  18.68  26.31 
1980 03 32.79 -99.99 -99.99 
1980 09 24.39   5.84  15.11 
1980 11 33.46 -99.99 -99.99 
1980 12 34.75  17.40  26.07 
1981 01 37.82  22.39  30.10 
1981 02 35.02 -99.99 -99.99 
1982 10 99.99   9.72 -99.99 
