1968 05 28.69  23.61  26.15 
1968 07 27.17  22.41  24.79 
1968 08 27.87  21.90  24.88 
1968 09 99.99  23.88 -99.99 
1968 10 31.65  24.85  28.25 
1968 11 33.43  25.14  29.28 
1968 12 32.70  25.39  29.04 
1969 01 31.09  24.33  27.71 
1969 02 30.38  24.44  27.41 
1969 03 30.77  24.49  27.63 
1969 04 31.42  24.74  28.08 
1969 05 30.35  24.75  27.55 
1969 06 28.27  21.83  25.05 
1969 07 28.15 -99.99 -99.99 
1969 08 28.50  23.23  25.86 
1969 09 29.60  23.18  26.39 
1969 10 31.02  24.26  27.64 
1969 11 33.77  25.23  29.50 
1969 12 32.82  25.39  29.10 
1970 01 31.96  24.55  28.25 
1970 02 31.38  24.91  28.14 
1970 03 31.67  24.72  28.19 
1970 04 30.98  25.17  28.07 
1970 05 99.99  24.83 -99.99 
1970 06 99.99  24.07 -99.99 
1970 07 27.91  21.61  24.76 
1970 08 28.74  21.75  25.24 
1970 09 30.67  23.68  27.17 
1970 10 32.80  25.43  29.11 
1970 11 33.02  25.12  29.07 
1970 12 99.99  24.99 -99.99 
1971 01 31.66  25.14  28.40 
1971 02 30.78  24.32  27.55 
1971 03 29.57  23.82  26.69 
1971 04 29.74  23.67  26.70 
1971 05 28.74  23.24  25.99 
1971 06 27.31  21.41  24.36 
1971 07 26.96  21.03  23.99 
1971 08 28.56  22.78  25.67 
1971 09 30.25  24.55  27.40 
1971 10 32.25  24.96  28.60 
1971 11 32.95  25.22  29.08 
1971 12 31.86  24.58  28.22 
1972 01 31.45  24.21  27.83 
1972 02 30.45  23.99  27.22 
1972 03 29.95  24.11  27.03 
1972 04 30.37  24.22  27.29 
1972 05 29.23 -99.99 -99.99 
1972 06 27.80  22.39  25.09 
1972 07 27.03  21.71  24.37 
1972 08 28.14  22.50  25.32 
1972 09 28.66  23.56  26.11 
1972 10 30.68  23.56  27.12 
1972 11 31.80  24.63  28.21 
1972 12 32.89  25.53  29.21 
1973 01 31.56  24.93  28.24 
1973 02 31.81  25.68  28.74 
1973 03 30.35  24.24  27.29 
1973 04 30.46  24.82  27.64 
1973 05 30.26  24.62  27.44 
1973 06 29.69  23.80  26.74 
1973 07 28.16  22.47  25.31 
1973 08 29.23  23.72  26.47 
1973 10 99.99  24.33 -99.99 
1973 11 31.37  24.01  27.69 
1973 12 31.90  23.76  27.83 
1974 01 29.74  23.24  26.49 
1974 02 30.10  23.25  26.67 
1974 03 29.16  22.12  25.64 
1974 04 29.99  23.31  26.65 
1974 05 28.89  23.34  26.11 
1974 06 27.31 -99.99 -99.99 
1974 07 27.00  19.51  23.25 
1974 08 28.44  21.82  25.13 
1974 09 30.34 -99.99 -99.99 
1974 10 30.85  24.15  27.50 
1974 11 31.69  24.89  28.29 
1974 12 30.48  24.07  27.27 
1975 01 30.89  24.32  27.60 
1975 02 29.94  24.35  27.14 
1975 03 30.49  24.39  27.43 
1975 04 30.16  24.57  27.36 
1975 05 29.90  24.77  27.33 
1975 06 27.97  21.54  24.75 
1975 07 28.23  22.69  25.46 
1975 08 29.10  23.20  26.15 
1975 09 30.40  24.28  27.34 
1975 10 31.96  25.43  28.69 
1975 11 32.82  25.22  29.02 
1975 12 30.88  25.03  27.95 
1976 01 30.32  24.22  27.27 
1976 02 30.22 -99.99 -99.99 
1976 03 30.22 -99.99 -99.99 
1976 04 30.81  23.57  27.18 
1976 05 29.28  23.01  26.14 
1976 06 27.87  21.89  24.88 
1976 07 27.23  21.77  24.50 
1976 08 27.41  21.76  24.58 
1976 09 29.86  22.76  26.31 
1976 10 31.67  24.30  27.98 
1976 11 33.63  25.32  29.47 
1976 12 32.65  25.57  29.11 
1977 01 31.23  24.87  28.05 
1977 02 30.87  25.04  27.95 
1977 03 29.84  24.13  26.98 
1977 04 30.34  23.85  27.09 
1977 05 28.90  23.48  26.18 
1977 06 26.85  21.35  24.10 
1977 07 26.03  20.17  23.10 
1977 08 27.58  21.65  24.61 
1977 09 28.86  22.38  25.62 
1977 10 30.53  24.41  27.47 
1977 11 32.30  24.52  28.41 
1977 12 32.00  25.29  28.65 
1978 01 31.21  24.89  28.05 
1978 02 31.11  24.71  27.91 
1978 03 30.70  24.77  27.73 
1978 04 30.95  24.64  27.79 
1978 05 30.31  25.28  27.79 
1978 06 28.39  23.19  25.79 
1978 07 28.05  22.72  25.38 
1978 08 28.36  23.35  25.85 
1980 11 33.45  24.06  28.75 
1980 12 32.50  24.86  28.68 
1981 01 30.58  24.10  27.34 
1981 02 30.06  23.31  26.68 
1981 03 29.95 -99.99 -99.99 
1981 04 31.98  21.13  26.55 
1981 05 29.32  18.85  24.08 
1981 06 29.02  18.85  23.93 
1981 07 28.11 -99.99 -99.99 
1981 08 29.16 -99.99 -99.99 
1981 09 29.63  20.73  25.18 
1981 11 32.71  20.23  26.47 
1981 12 32.33  24.83  28.58 
1982 01 31.22  22.51  26.86 
1982 03 31.20  23.04  27.12 
1982 04 31.77  19.77  25.77 
1982 05 29.62  19.39  24.50 
1982 07 26.60 -99.99 -99.99 
1982 08 26.85 -99.99 -99.99 
1982 09 28.47  23.05  25.75 
1982 10 99.99  23.40 -99.99 
1983 02 32.25  25.67  28.96 
1983 03 31.03  25.66  28.34 
1983 04 30.22  25.49  27.85 
1983 05 99.99  24.83 -99.99 
1983 06 27.79  23.21  25.50 
1983 07 26.55 -99.99 -99.99 
1983 08 27.80  22.97  25.38 
1983 09 99.99  23.72 -99.99 
1983 10 31.94  25.07  28.50 
1983 11 33.29  25.84  29.56 
1984 05 29.44 -99.99 -99.99 
1984 06 27.58  22.81  25.19 
1984 07 26.37  21.11  23.74 
1984 08 28.38  22.68  25.53 
1984 09 29.62 -99.99 -99.99 
1984 10 31.34 -99.99 -99.99 
1984 11 33.41 -99.99 -99.99 
1984 12 31.48 -99.99 -99.99 
1985 01 32.08 -99.99 -99.99 
1985 02 31.20  24.15  27.67 
1985 03 31.55  24.16  27.85 
1985 04 30.34  23.98  27.16 
1985 05 29.60  23.69  26.64 
1985 06 26.99  20.69  23.84 
1985 07 25.64  20.08  22.86 
1985 08 27.47  22.11  24.79 
1985 09 29.56 -99.99 -99.99 
1985 10 31.89  25.04  28.46 
1985 11 33.07  26.37  29.72 
1985 12 32.72  25.76  29.24 
1986 01 30.99  25.44  28.21 
1986 02 31.02  25.03  28.02 
1986 03 31.04  24.21  27.62 
1986 04 30.51  24.42  27.46 
1986 07 28.36  22.74  25.55 
1987 02 30.10  24.11  27.10 
1987 10 99.99  23.60 -99.99 
1987 11 34.02  25.96  29.99 
1988 03 31.27  25.53  28.40 
1990 01 31.89  25.44  28.66 
1990 02 32.72  25.39  29.05 
1990 03 32.22  25.13  28.67 
1990 04 31.54  25.27  28.40 
1990 05 29.27  24.80  27.03 
1990 06 27.69  22.94  25.31 
1990 08 27.47  22.24  24.85 
1990 09 28.49  24.32  26.40 
1990 11 33.81  26.17  29.99 
1990 12 33.23  26.14  29.68 
