1968 09 99.99 -99.99  26.40 
1968 10 99.99 -99.99  22.50 
1968 11 99.99 -99.99  20.29 
1968 12 99.99 -99.99  19.20 
1969 01 99.99 -99.99  18.10 
1969 02 99.99 -99.99  16.20 
1969 03 99.99 -99.99  18.29 
1969 04 99.99 -99.99  22.30 
1969 05 99.99 -99.99  26.00 
1969 06 99.99 -99.99  26.40 
1969 07 99.99 -99.99  28.60 
1969 08 99.99 -99.99  27.40 
1969 09 99.99 -99.99  26.60 
1969 10 99.99 -99.99  22.30 
1969 11 99.99 -99.99  19.10 
1969 12 99.99 -99.99  16.39 
1970 01 99.99 -99.99  14.70 
1970 02 99.99 -99.99  16.89 
1970 03 99.99 -99.99  16.60 
1970 04 99.99 -99.99  21.00 
1970 05 99.99 -99.99  25.50 
1970 06 99.99 -99.99  27.10 
1970 07 99.99 -99.99  28.20 
1970 08 99.99 -99.99  27.60 
1970 09 99.99 -99.99  26.50 
1970 10 99.99 -99.99  24.60 
1970 11 99.99 -99.99  21.10 
1970 12 99.99 -99.99  18.29 
1971 01 99.99 -99.99  13.50 
1971 02 99.99 -99.99  15.90 
1971 03 99.99 -99.99  18.29 
1971 04 99.99 -99.99  22.70 
1971 05 99.99 -99.99  24.70 
1971 06 99.99 -99.99  27.50 
1971 07 99.99 -99.99  28.30 
1971 08 99.99 -99.99  27.50 
1971 09 99.99 -99.99  26.20 
1971 10 99.99 -99.99  22.80 
1971 11 99.99 -99.99  19.50 
1971 12 99.99 -99.99  17.39 
1972 01 99.99 -99.99  16.10 
1972 02 99.99 -99.99  15.50 
1972 03 99.99 -99.99  18.20 
1972 04 99.99 -99.99  21.70 
1972 05 99.99 -99.99  25.60 
1972 06 99.99 -99.99  27.10 
1972 07 99.99 -99.99  27.50 
1972 08 99.99 -99.99  26.70 
1972 09 99.99 -99.99  26.50 
1972 10 99.99 -99.99  24.10 
1972 11 99.99 -99.99  21.50 
1972 12 99.99 -99.99  17.60 
1973 01 99.99 -99.99  16.00 
1973 02 99.99 -99.99  19.39 
1973 03 99.99 -99.99  20.39 
1973 04 99.99 -99.99  23.60 
1973 05 99.99 -99.99  26.30 
1973 06 99.99 -99.99  27.20 
1973 07 99.99 -99.99  27.50 
1973 08 99.99 -99.99  26.90 
1973 09 99.99 -99.99  26.70 
1973 10 99.99 -99.99  24.10 
1973 11 99.99 -99.99  20.39 
1973 12 99.99 -99.99  15.10 
1974 01 99.99 -99.99  15.40 
1974 02 99.99 -99.99  15.20 
1974 03 99.99 -99.99  18.50 
1974 04 99.99 -99.99  22.70 
1974 05 99.99 -99.99  25.90 
1974 06 99.99 -99.99  26.70 
1974 07 99.99 -99.99  27.90 
1974 08 99.99 -99.99  27.40 
1974 09 99.99 -99.99  26.40 
1974 10 99.99 -99.99  24.80 
1974 11 99.99 -99.99  21.30 
1974 12 99.99 -99.99  19.00 
1975 01 99.99 -99.99  15.80 
1975 02 99.99 -99.99  17.70 
1975 03 99.99 -99.99  19.10 
1975 04 99.99 -99.99  24.10 
1975 05 99.99 -99.99  25.90 
1975 06 99.99 -99.99  26.70 
1975 07 99.99 -99.99  28.10 
1975 08 99.99 -99.99  27.40 
1975 09 99.99 -99.99  27.10 
1975 10 99.99 -99.99  25.60 
1975 11 99.99 -99.99  20.50 
1975 12 99.99 -99.99  14.90 
1976 01 18.41  13.38  15.89 
1980 10 27.48  22.72  25.09 
1980 12 18.56  13.89  16.22 
1981 01 18.95  12.88  15.92 
1985 01 20.87  12.33  16.60 
1985 02 20.64  15.27  17.95 
1985 03 21.14  14.27  17.70 
1985 04 25.89  19.15  22.52 
1985 05 30.44  23.59  27.01 
1985 06 30.41  24.77  27.59 
1985 07 31.82  25.24  28.53 
1985 08 31.05  25.10  28.07 
1985 11 26.22  17.18  21.70 
1985 12 22.60  12.44  17.52 
1986 02 19.14  12.14  15.64 
1986 03 23.16  15.41  19.28 
1986 04 28.19  20.55  24.37 
1986 05 28.53  22.71  25.62 
1986 06 31.37  24.94  28.15 
1986 07 32.49  25.59  29.04 
1986 08 32.06  25.23  28.64 
1986 09 30.72  23.48  27.09 
1986 10 28.92  21.07  24.99 
1986 11 25.34  17.62  21.48 
1987 01 21.41  11.85  16.63 
1987 02 22.52  13.41  17.96 
1987 03 25.46  17.35  21.40 
1987 04 26.33  19.03  22.68 
1987 06 31.24  24.94  28.09 
1987 07 32.34  25.67  29.00 
1987 10 29.57  21.99  25.78 
1987 11 26.50  18.98  22.74 
1988 01 21.72  13.62  17.67 
1988 02 21.58  14.34  17.95 
1988 05 30.32  23.52  26.92 
1988 07 32.73  25.81  29.27 
1988 08 31.24  24.24  27.74 
1988 09 30.09  23.74  26.91 
1988 10 28.48  21.42  24.95 
1988 11 23.92  14.87  19.39 
1988 12 22.37  11.18  16.77 
1989 01 20.80  13.44  17.11 
1989 02 22.20  13.03  17.61 
1989 03 22.58  14.28  18.43 
1989 04 27.09  20.46  23.78 
1989 05 29.39  21.93  25.66 
1989 06 31.69  23.74  27.71 
1989 07 32.75  25.25  29.00 
1989 08 32.41  25.68  29.05 
1989 10 28.97  20.74  24.85 
1990 01 20.65  13.71  17.18 
1990 02 22.20  15.18  18.69 
1990 03 23.48  15.59  19.53 
1990 04 25.43  19.14  22.28 
1990 05 29.53  22.28  25.90 
1990 06 30.78  24.68  27.73 
1990 07 32.52  25.35  28.93 
1990 08 31.31  25.53  28.42 
1990 09 30.94  24.13  27.53 
1990 10 28.82  20.46  24.64 
1990 11 27.43  18.26  22.84 
1990 12 24.11  14.42  19.26 
1991 01 21.64  13.67  17.65 
1991 02 21.75  13.84  17.79 
1991 03 25.37  18.12  21.74 
1991 04 27.13  19.93  23.53 
1991 05 30.37  22.39  26.38 
1991 07 32.38  25.66  29.02 
1991 08 32.29  25.61  28.95 
1991 09 30.44  24.18  27.31 
1991 10 27.39  20.00  23.69 
1992 02 19.87  12.92  16.40 
1992 03 25.18  17.21  21.20 
1992 04 26.12  20.03  23.07 
1992 05 28.39  21.58  24.98 
1992 06 31.44  24.39  27.91 
1992 07 32.13  25.29  28.71 
1992 08 31.62  25.08  28.35 
1992 11 25.22  16.29  20.75 
1993 04 26.40  19.49  22.94 
1993 05 29.77  22.46  26.11 
1993 06 31.86  24.70  28.28 
1994 02 22.71  14.96  18.83 
1994 03 22.30  14.86  18.58 
1994 04 29.31  21.48  25.39 
1994 05 30.36  23.46  26.91 
1994 07 32.28  25.68  28.98 
1994 08 30.93  25.00  27.96 
1994 09 30.38  22.82  26.59 
1994 10 28.26  19.71  23.99 
1994 11 27.34  17.37  22.36 
1994 12 25.13  16.73  20.93 
1995 01 21.74  12.77  17.25 
1995 02 19.58  12.75  16.16 
1996 01 22.96  11.84  17.40 
1996 02 20.90  12.46  16.68 
1996 03 25.88  16.70  21.29 
1996 04 23.13  16.12  19.62 
1996 05 28.05  21.82  24.93 
1996 07 33.12  25.22  29.16 
1996 09 31.38  24.62  28.00 
1996 12 23.52  13.33  18.42 
1997 02 19.52  13.62  16.57 
