1979 02 31.79  25.13  28.46 
1979 03 31.20  25.00  28.10 
1979 04 30.86  23.71  27.28 
1979 05 29.47  23.49  26.48 
1979 06 28.68  21.75  25.21 
1979 07 27.42  20.74  24.08 
1979 08 28.73  20.04  24.39 
1979 09 30.15  22.26  26.20 
1979 10 31.74  23.72  27.73 
1979 11 31.91  24.88  28.39 
1979 12 32.75  27.04  29.90 
1980 01 31.68  25.89  28.78 
1980 02 31.08  25.26  28.17 
1980 03 30.22  24.90  27.56 
1980 04 31.31  24.55  27.93 
1980 05 30.91  23.52  27.21 
1980 06 30.08  22.28  26.18 
1980 07 28.83  20.78  24.80 
1980 08 29.56  21.09  25.32 
1980 09 30.91  21.27  26.09 
1980 10 31.46  23.37  27.41 
1980 11 32.41  25.02  28.72 
1980 12 32.30  26.15  29.22 
1981 01 30.57  25.73  28.15 
1981 02 31.13  25.54  28.33 
1981 03 31.29  24.93  28.11 
1981 04 32.55  24.54  28.54 
1981 05 31.13  23.17  27.15 
1981 06 30.30  22.52  26.41 
1981 07 30.00  22.84  26.42 
1981 08 31.02  21.04  26.03 
1981 09 31.11  22.67  26.89 
1981 10 32.23  23.53  27.88 
1981 11 32.84  26.37  29.61 
1981 12 32.96  27.11  30.03 
1982 01 31.79  25.98  28.88 
1982 02 30.31  25.00  27.65 
1982 03 31.09  25.17  28.13 
1982 04 30.65  24.01  27.33 
1982 05 30.93  23.03  26.98 
1982 06 29.09  21.24  25.16 
1982 07 28.31  19.69  24.00 
1982 08 28.65  20.43  24.54 
1982 09 30.24  20.41  25.32 
1982 10 31.02  20.17  25.59 
1982 11 31.92  23.60  27.76 
1982 12 33.09  26.90  30.00 
1983 01 33.41  27.01  30.21 
1983 03 32.16  25.92  29.04 
1983 04 31.00  25.02  28.01 
1983 05 29.41  23.23  26.32 
1983 06 28.72 -99.99 -99.99 
1983 07 27.95  20.89  24.42 
1983 08 29.95  21.44  25.69 
1983 09 31.99  21.96  26.97 
1983 10 32.86  24.42  28.64 
1983 11 33.12  26.72  29.91 
1983 12 33.09  25.80  29.45 
1984 01 32.41  26.59  29.50 
1984 02 30.36  24.89  27.62 
1984 03 30.79  25.53  28.16 
1984 04 31.87  24.51  28.19 
1984 05 31.27  23.80  27.53 
1984 06 29.30  21.50  25.40 
1984 07 28.20  19.62  23.91 
1984 08 30.16  20.37  25.27 
1984 09 31.82 -99.99 -99.99 
1984 10 32.64  23.00  27.82 
1984 11 33.18  25.97  29.57 
1984 12 32.74  26.23  29.48 
1985 01 32.84  26.33  29.59 
1985 02 31.35  25.65  28.50 
1985 03 31.70  25.58  28.64 
1985 04 30.73  24.45  27.59 
1985 05 30.09  23.80  26.94 
1985 06 28.48  20.82  24.65 
1985 07 27.13  19.35  23.24 
1985 08 30.31  20.25  25.28 
1985 09 31.35  20.48  25.91 
1985 10 31.94  22.85  27.39 
1985 11 33.31  26.02  29.66 
1985 12 33.78  26.36  30.07 
1986 01 32.13  25.58  28.85 
1986 02 32.05  26.26  29.15 
1986 03 31.19  24.59  27.89 
1986 04 31.20  24.29  27.74 
1986 05 31.30  22.94  27.12 
1986 06 30.47  22.07  26.27 
1986 07 29.69  22.40  26.04 
1986 08 30.01  19.35  24.68 
1986 09 31.59  21.88  26.73 
1986 10 32.21  24.55  28.38 
1986 11 33.12  25.10  29.11 
