1971 05 99.99 -99.99  27.90 
1971 06 99.99 -99.99  27.50 
1971 07 99.99 -99.99  27.40 
1971 08 99.99 -99.99  27.30 
1971 09 99.99 -99.99  27.50 
1971 10 99.99 -99.99  26.70 
1971 11 99.99 -99.99  25.30 
1971 12 99.99 -99.99  24.90 
1972 01 99.99 -99.99  24.60 
1972 02 99.99 -99.99  24.30 
1972 03 99.99 -99.99  25.50 
1972 04 99.99 -99.99  27.60 
1972 05 99.99 -99.99  28.50 
1972 06 99.99 -99.99  28.60 
1972 07 99.99 -99.99  28.00 
1972 08 99.99 -99.99  27.10 
1972 09 99.99 -99.99  27.20 
1972 10 99.99 -99.99  26.80 
1972 11 99.99 -99.99  26.90 
1972 12 99.99 -99.99  26.40 
1973 01 99.99 -99.99  23.40 
1973 02 99.99 -99.99  23.90 
1973 03 99.99 -99.99  27.00 
1973 04 99.99 -99.99  27.80 
1973 05 99.99 -99.99  28.50 
1973 06 99.99 -99.99  28.50 
1973 07 99.99 -99.99  28.10 
1973 08 99.99 -99.99  28.40 
1973 09 99.99 -99.99  28.30 
1973 10 99.99 -99.99  26.80 
1973 11 99.99 -99.99  26.30 
1973 12 99.99 -99.99  24.00 
1974 01 99.99 -99.99  24.70 
1974 02 99.99 -99.99  23.70 
1974 03 99.99 -99.99  25.90 
1974 04 99.99 -99.99  27.50 
1974 05 99.99 -99.99  28.40 
1974 06 99.99 -99.99  28.00 
1974 07 99.99 -99.99  27.70 
1974 08 99.99 -99.99  27.70 
1974 09 99.99 -99.99  27.30 
1974 10 99.99 -99.99  25.10 
1974 11 99.99 -99.99  25.50 
1974 12 99.99 -99.99  23.30 
1975 01 99.99 -99.99  24.30 
1975 02 99.99 -99.99  25.00 
1975 03 99.99 -99.99  26.70 
1975 04 99.99 -99.99  27.90 
1975 05 99.99 -99.99  29.10 
1975 06 99.99 -99.99  29.00 
1975 07 99.99 -99.99  28.20 
1975 08 99.99 -99.99  27.90 
1975 09 99.99 -99.99  27.00 
1975 10 99.99 -99.99  26.00 
1975 11 99.99 -99.99  24.60 
1975 12 99.99 -99.99  23.60 
1976 01 99.99 -99.99  24.20 
1976 02 99.99 -99.99  22.90 
1976 03 99.99 -99.99  25.70 
1976 04 99.99 -99.99  26.20 
1976 05 99.99 -99.99  28.00 
1976 06 99.99 -99.99  26.10 
1976 07 99.99 -99.99  27.60 
1976 08 99.99 -99.99  27.80 
1976 09 99.99 -99.99  27.80 
1976 10 99.99 -99.99  26.50 
1976 11 99.99 -99.99  24.70 
1976 12 99.99 -99.99  23.90 
1977 01 99.99 -99.99  24.10 
1977 02 99.99 -99.99  24.50 
1977 03 99.99 -99.99  26.70 
1977 04 99.99 -99.99  26.30 
1977 05 99.99 -99.99  27.80 
1977 06 99.99 -99.99  28.10 
1977 07 99.99 -99.99  28.10 
1977 08 99.99 -99.99  29.00 
1977 09 99.99 -99.99  28.60 
1977 10 99.99 -99.99  27.60 
1977 11 99.99 -99.99  25.90 
1977 12 99.99 -99.99  25.60 
1978 01 99.99 -99.99  24.30 
1978 02 99.99 -99.99  24.40 
1978 03 99.99 -99.99  25.70 
1978 04 99.99 -99.99  27.90 
1978 05 99.99 -99.99  29.80 
1978 06 99.99 -99.99  29.00 
1978 07 99.99 -99.99  27.60 
1978 08 99.99 -99.99  27.50 
1978 09 99.99 -99.99  27.90 
1978 10 99.99 -99.99  26.70 
1978 11 99.99 -99.99  26.20 
1978 12 99.99 -99.99  25.50 
1979 01 99.99 -99.99  24.30 
1979 02 99.99 -99.99  24.50 
1979 03 99.99 -99.99  26.30 
1979 04 99.99 -99.99  28.20 
1979 05 99.99 -99.99  29.80 
1979 06 99.99 -99.99  28.20 
1979 07 99.99 -99.99  28.70 
1979 08 99.99 -99.99  28.10 
1979 09 99.99 -99.99  27.70 
1979 10 99.99 -99.99  26.70 
1979 11 99.99 -99.99  24.80 
1979 12 99.99 -99.99  24.40 
1980 01 99.99 -99.99  24.80 
1980 02 99.99 -99.99  25.20 
1980 03 99.99 -99.99  26.80 
1980 04 99.99 -99.99  26.70 
1980 05 99.99 -99.99  29.40 
1980 06 99.99 -99.99  28.30 
1980 07 99.99 -99.99  28.50 
1980 08 99.99 -99.99  29.10 
1980 09 99.99 -99.99  27.90 
1980 10 99.99 -99.99  25.90 
1980 11 99.99 -99.99  24.80 
1980 12 99.99 -99.99  23.10 
1995 01 29.00  18.40  23.70 
1995 02 28.80  18.40  23.59 
1995 03 26.90  20.50  23.70 
1995 04 30.00  26.80  28.40 
1995 05 31.00  28.30  29.65 
1995 06 31.80  27.20  29.50 
1995 07 29.50  25.70  27.60 
1995 08 29.70  27.60  28.65 
1995 09 30.00  26.60  28.30 
1996 01 28.10  17.29  22.70 
1996 02 26.80  18.90  22.84 
1996 03 28.10  19.00  23.55 
1996 04 29.00  23.60  26.30 
1996 08 29.50  25.00  27.25 
1997 01 26.50  20.20  23.35 
1997 02 27.30  23.80  25.55 
2001 07 29.10  26.00  27.55 
2001 11 28.10  21.50  24.80 
