1971 01 99.99 -99.99  31.60 
1971 02 99.99 -99.99  30.50 
1971 03 99.99 -99.99  28.50 
1971 04 99.99 -99.99  26.10 
1971 05 99.99 -99.99  24.20 
1971 06 99.99 -99.99  18.90 
1971 07 99.99 -99.99  19.60 
1971 08 99.99 -99.99  24.70 
1971 09 99.99 -99.99  28.50 
1971 10 99.99 -99.99  31.90 
1971 11 99.99 -99.99  30.60 
1971 12 99.99 -99.99  30.30 
1972 01 99.99 -99.99  31.40 
1972 02 99.99 -99.99  30.50 
1972 03 99.99 -99.99  27.60 
1972 04 99.99 -99.99  26.60 
1972 05 99.99 -99.99  22.50 
1972 06 99.99 -99.99  21.30 
1972 07 99.99 -99.99  19.79 
1972 08 99.99 -99.99  24.70 
1972 09 99.99 -99.99  26.80 
1972 10 99.99 -99.99  30.60 
1972 11 99.99 -99.99  32.40 
1972 12 99.99 -99.99  33.00 
1973 01 99.99 -99.99  30.20 
1973 02 99.99 -99.99  30.40 
1973 03 99.99 -99.99  30.70 
1973 04 99.99 -99.99  29.00 
1973 05 99.99 -99.99  25.70 
1973 06 99.99 -99.99  23.10 
1973 07 99.99 -99.99  23.10 
1973 08 99.99 -99.99  25.00 
1973 09 99.99 -99.99  26.20 
1973 10 99.99 -99.99  30.00 
1973 11 99.99 -99.99  31.50 
1973 12 99.99 -99.99  29.90 
1974 01 99.99 -99.99  27.10 
1974 02 99.99 -99.99  28.30 
1974 03 99.99 -99.99  27.50 
1974 04 99.99 -99.99  25.00 
1974 05 99.99 -99.99  22.30 
1974 06 99.99 -99.99  18.00 
1974 07 99.99 -99.99  20.10 
1974 08 99.99 -99.99  22.80 
1974 09 99.99 -99.99  25.00 
1974 10 99.99 -99.99  28.60 
1974 11 99.99 -99.99  29.50 
1974 12 99.99 -99.99  30.90 
1975 01 99.99 -99.99  30.90 
1975 02 99.99 -99.99  29.10 
1975 03 99.99 -99.99  28.40 
1975 04 99.99 -99.99  25.70 
1975 05 99.99 -99.99  22.40 
1975 06 99.99 -99.99  19.79 
1975 07 99.99 -99.99  22.40 
1975 08 99.99 -99.99  22.20 
1975 09 99.99 -99.99  26.80 
1975 10 99.99 -99.99  27.10 
1975 11 99.99 -99.99  30.20 
1975 12 99.99 -99.99  29.80 
1976 01 99.99 -99.99  28.90 
1976 02 99.99 -99.99  28.20 
1976 03 99.99 -99.99  27.30 
1976 04 99.99 -99.99  25.90 
1976 05 99.99 -99.99  20.80 
1976 06 99.99 -99.99  19.00 
1976 07 99.99 -99.99  19.29 
1976 08 99.99 -99.99  21.00 
1976 09 99.99 -99.99  25.30 
1976 10 99.99 -99.99  29.30 
1976 11 99.99 -99.99  31.90 
1976 12 99.99 -99.99  31.40 
1977 01 99.99 -99.99  30.40 
1977 02 99.99 -99.99  30.40 
1977 03 99.99 -99.99  28.30 
1977 04 99.99 -99.99  26.30 
1977 05 99.99 -99.99  23.20 
1977 06 99.99 -99.99  19.00 
1977 07 99.99 -99.99  18.70 
1977 08 99.99 -99.99  22.50 
1977 09 99.99 -99.99  25.30 
1977 10 99.99 -99.99  30.80 
1977 11 99.99 -99.99  32.00 
1977 12 99.99 -99.99  31.00 
1978 01 99.99 -99.99  30.00 
1978 02 99.99 -99.99  29.40 
1978 03 99.99 -99.99  30.10 
1978 04 99.99 -99.99  26.90 
1978 05 99.99 -99.99  24.20 
1978 06 99.99 -99.99  19.90 
1978 07 99.99 -99.99  18.40 
1978 08 99.99 -99.99  21.30 
1978 09 99.99 -99.99  23.60 
1978 10 99.99 -99.99  28.80 
1978 11 99.99 -99.99  31.00 
1978 12 99.99 -99.99  31.60 
1979 01 99.99 -99.99  30.90 
1979 02 99.99 -99.99  30.10 
1979 03 99.99 -99.99  29.80 
1979 04 99.99 -99.99  28.70 
1979 05 99.99 -99.99  22.30 
1979 06 99.99 -99.99  20.70 
1979 07 99.99 -99.99  20.10 
1979 08 99.99 -99.99  24.40 
1979 09 99.99 -99.99  27.40 
1979 10 99.99 -99.99  31.00 
1979 11 99.99 -99.99  32.50 
1979 12 99.99 -99.99  32.40 
1980 01 99.99 -99.99  31.20 
1980 02 99.99 -99.99  28.80 
1980 03 99.99 -99.99  30.10 
1980 04 99.99 -99.99  27.70 
1980 05 99.99 -99.99  25.10 
1980 06 99.99 -99.99  22.20 
1980 07 99.99 -99.99  20.80 
1980 08 99.99 -99.99  23.10 
1980 09 99.99 -99.99  27.40 
1980 10 99.99 -99.99  30.50 
1980 11 99.99 -99.99  32.00 
1980 12 99.99 -99.99  31.50 
1996 09 34.77  18.70  26.74 
1996 10 37.99  22.98  30.48 
1996 11 38.39  24.24  31.31 
1996 12 36.66  24.80  30.73 
1997 01 33.20  23.23  28.21 
1997 02 33.38  23.52  28.45 
1997 04 33.78  19.16  26.47 
1997 05 29.70  17.87  23.79 
1997 06 26.20  13.11  19.65 
1997 07 25.93  12.40  19.16 
1997 10 36.88  22.58  29.73 
1997 12 36.39  23.83  30.11 
1998 01 37.79  24.56  31.17 
1998 02 37.93  24.28  31.11 
1998 03 38.15  25.01  31.58 
1998 04 34.72  22.22  28.47 
1998 05 31.39  17.62  24.50 
1998 06 29.20  16.20  22.70 
1998 07 28.41  15.63  22.02 
1998 08 32.11  17.40  24.75 
1998 09 34.97  20.63  27.80 
1998 10 39.04  25.19  32.11 
1998 11 37.11  24.74  30.92 
1998 12 34.87  23.89  29.38 
1999 01 35.77  24.13  29.95 
1999 02 33.72  22.77  28.24 
1999 03 35.52  23.44  29.48 
1999 04 32.59  19.67  26.13 
1999 05 31.29  15.31  23.30 
1999 06 28.10  14.49  21.29 
1999 07 27.50  12.68  20.09 
1999 08 30.53  15.71  23.12 
1999 10 35.54  22.44  28.99 
1999 11 35.75  23.60  29.67 
1999 12 35.56  23.98  29.77 
2000 01 33.63  23.13  28.38 
2000 02 33.62  23.52  28.57 
2000 03 32.21  22.77  27.49 
2000 04 31.35  21.60  26.47 
2000 05 26.65  14.95  20.80 
2000 06 24.44  11.45  17.94 
2000 07 28.24  13.24  20.74 
2000 09 35.04  18.94  26.99 
2000 10 34.29  21.79  28.04 
2000 11 37.91  24.96  31.43 
2000 12 35.22  23.80  29.51 
2001 01 36.41  24.58  30.49 
2001 02 33.63  23.94  28.78 
