1981 01 99.99 -99.99  24.00 
1981 02 99.99 -99.99  24.50 
1981 03 99.99 -99.99  25.10 
1981 04 99.99 -99.99  25.30 
1981 05 99.99 -99.99  24.20 
1981 06 99.99 -99.99  23.70 
1981 07 99.99 -99.99  23.80 
1981 08 99.99 -99.99  23.10 
1981 09 99.99 -99.99  23.40 
1981 10 99.99 -99.99  23.10 
1981 11 99.99 -99.99  23.20 
1981 12 99.99 -99.99  24.10 
1982 01 99.99 -99.99  24.40 
1982 02 99.99 -99.99  25.10 
1982 03 99.99 -99.99  24.90 
1982 04 99.99 -99.99  25.00 
1982 05 99.99 -99.99  24.40 
1982 06 99.99 -99.99  23.90 
1982 07 99.99 -99.99  23.50 
1982 08 99.99 -99.99  23.80 
1982 09 99.99 -99.99  24.20 
1982 10 99.99 -99.99  24.30 
1982 11 99.99 -99.99  25.10 
1982 12 99.99 -99.99  25.20 
1983 01 99.99 -99.99  25.80 
1983 02 99.99 -99.99  25.80 
1983 03 99.99 -99.99  26.30 
1983 04 99.99 -99.99  25.60 
1983 05 99.99 -99.99  25.70 
1983 06 99.99 -99.99  25.40 
1983 07 99.99 -99.99  25.20 
1983 08 99.99 -99.99  25.00 
1983 09 99.99 -99.99  24.20 
1983 10 99.99 -99.99  24.00 
1983 11 99.99 -99.99  23.80 
1983 12 99.99 -99.99  23.80 
1984 01 99.99 -99.99  24.30 
1984 02 99.99 -99.99  24.40 
1984 03 99.99 -99.99  24.80 
1984 04 99.99 -99.99  24.80 
1984 06 99.99 -99.99  24.00 
1984 07 99.99 -99.99  22.80 
1984 08 99.99 -99.99  23.20 
1984 09 99.99 -99.99  22.70 
1984 10 99.99 -99.99  22.80 
1984 11 99.99 -99.99  23.20 
1984 12 99.99 -99.99  23.90 
1985 01 99.99 -99.99  23.50 
1985 02 99.99 -99.99  24.10 
1985 03 99.99 -99.99  24.60 
1985 04 99.99 -99.99  24.50 
1985 05 99.99 -99.99  23.80 
1985 06 99.99 -99.99  23.80 
1985 07 99.99 -99.99  22.50 
1985 08 99.99 -99.99  22.50 
1985 09 99.99 -99.99  22.90 
1985 10 99.99 -99.99  22.90 
1985 11 99.99 -99.99  23.40 
1985 12 99.99 -99.99  23.50 
1986 01 99.99 -99.99  23.70 
1986 02 99.99 -99.99  24.40 
1986 03 99.99 -99.99  24.80 
1986 04 99.99 -99.99  24.80 
1986 05 99.99 -99.99  24.10 
1986 06 99.99 -99.99  23.30 
1986 07 99.99 -99.99  23.20 
1986 08 99.99 -99.99  23.60 
1986 09 99.99 -99.99  23.60 
1986 10 99.99 -99.99  23.40 
1986 11 99.99 -99.99  24.00 
1986 12 99.99 -99.99  24.20 
1987 01 99.99 -99.99  24.70 
1987 02 99.99 -99.99  25.30 
1987 03 99.99 -99.99  25.70 
1987 04 99.99 -99.99  25.60 
1987 05 99.99 -99.99  25.10 
1987 06 99.99 -99.99  24.70 
1987 07 99.99 -99.99  24.30 
1987 08 99.99 -99.99  24.10 
1987 09 99.99 -99.99  24.30 
1987 10 99.99 -99.99  24.10 
1987 11 99.99 -99.99  24.10 
1987 12 99.99 -99.99  24.60 
1988 01 99.99 -99.99  24.50 
1988 02 99.99 -99.99  25.00 
1988 03 99.99 -99.99  24.80 
1988 04 99.99 -99.99  25.00 
1988 05 99.99 -99.99  24.80 
1988 06 99.99 -99.99  23.20 
1988 07 99.99 -99.99  23.30 
1988 08 99.99 -99.99  22.90 
1988 09 99.99 -99.99  23.00 
1988 10 99.99 -99.99  23.10 
1988 11 99.99 -99.99  23.20 
1988 12 99.99 -99.99  23.70 
1989 01 99.99 -99.99  23.90 
1989 02 99.99 -99.99  24.30 
1989 03 99.99 -99.99  25.30 
1989 04 99.99 -99.99  25.00 
1989 05 99.99 -99.99  24.30 
1989 06 99.99 -99.99  23.40 
1989 07 99.99 -99.99  22.90 
1989 08 99.99 -99.99  23.10 
1989 09 99.99 -99.99  23.10 
1989 10 99.99 -99.99  23.40 
1989 11 99.99 -99.99  23.40 
1989 12 99.99 -99.99  23.60 
1990 01 99.99 -99.99  24.10 
1990 02 99.99 -99.99  24.80 
1990 03 99.99 -99.99  25.10 
1990 04 99.99 -99.99  24.90 
1990 05 99.99 -99.99  24.70 
1990 06 99.99 -99.99  24.30 
1990 07 99.99 -99.99  23.50 
1990 08 99.99 -99.99  23.30 
1990 09 99.99 -99.99  23.30 
1990 10 99.99 -99.99  23.20 
1990 11 99.99 -99.99  23.80 
1990 12 99.99 -99.99  24.00 
1991 01 29.00  21.70  25.35 
1991 02 29.90  22.00  25.95 
1991 03 30.60  22.30  26.45 
1991 04 30.80  22.10  26.45 
1991 05 29.50  22.10  25.80 
1991 06 28.20  21.50  24.85 
1991 07 28.10  20.80  24.45 
1991 08 27.60  20.70  24.15 
1991 09 28.70  20.20  24.45 
1991 10 28.20  20.90  24.55 
1991 11 28.60  21.20  24.90 
1991 12 29.60  21.90  25.75 
1992 01 29.80  22.10  25.95 
1992 02 30.80  22.10  26.45 
1992 03 31.60  22.90  27.25 
1992 04 32.09  23.00  27.55 
1992 05 31.40  22.50  26.95 
1992 06 29.80  22.20  26.00 
1992 07 29.10  20.70  24.90 
1992 08 29.10  21.00  25.05 
1992 09 29.40  20.70  25.05 
1992 10 28.90  20.80  24.84 
1992 11 28.90  20.50  24.70 
1992 12 29.90  20.50  25.20 
1993 01 30.80  21.10  25.95 
1993 02 30.00  21.10  25.55 
1993 03 31.80  21.10  26.45 
1993 04 32.30  21.40  26.84 
1993 05 30.80  21.20  26.00 
1993 06 30.00  20.90  25.45 
1993 07 29.20  20.40  24.80 
1993 08 29.10  19.29  24.20 
1993 09 28.90  19.20  24.05 
1993 10 29.20  19.50  24.35 
1993 11 28.60  19.70  24.15 
1993 12 29.20  19.90  24.55 
1994 01 29.00  19.90  24.45 
1994 02 29.60  19.79  24.70 
1994 03 29.60  20.20  24.90 
1994 04 29.50  19.50  24.50 
1994 05 29.10  20.90  25.00 
1994 06 28.00  19.20  23.60 
1994 07 27.70  18.50  23.10 
1994 08 28.60  18.79  23.70 
1994 09 31.00  19.50  25.25 
1994 10 30.00  20.90  25.45 
1994 11 29.00  20.50  24.75 
1994 12 29.50  21.80  25.65 
1995 01 30.30  22.00  26.15 
1995 02 30.90  22.20  26.55 
1995 03 31.20  21.60  26.40 
1995 04 29.80  22.10  25.95 
1995 05 28.60  22.10  25.35 
1995 06 28.30  21.90  25.09 
1995 07 27.10  21.20  24.15 
1995 08 27.00  20.80  23.90 
1995 09 28.20  20.40  24.30 
1995 10 27.40  20.70  24.05 
1995 11 26.50  20.60  23.55 
1995 12 28.90  20.90  24.90 
1996 01 28.30  21.10  24.70 
1996 02 30.00  21.30  25.65 
1996 03 30.30  22.00  26.15 
1996 04 29.20  21.80  25.50 
1996 05 28.40  21.70  25.05 
1996 06 26.30  20.50  23.40 
1996 07 27.00  20.00  23.50 
1996 08 27.20  20.00  23.60 
1996 09 27.90  20.50  24.20 
1996 10 27.90  20.10  24.00 
1996 11 28.70  20.00  24.35 
1996 12 28.70  20.90  24.80 
1997 01 28.30  21.00  24.65 
1997 02 29.70  21.70  25.70 
1997 03 30.30  22.50  26.40 
1997 04 30.60  22.10  26.35 
1997 05 30.30  22.50  26.40 
1997 06 30.30  22.30  26.30 
1997 07 30.20  22.70  26.45 
1997 08 29.60  22.60  26.10 
1997 09 30.30  22.50  26.40 
1997 10 30.40  22.80  26.59 
1997 11 30.30  22.60  26.45 
1997 12 31.00  23.10  27.05 
1998 01 31.00  23.50  27.25 
1998 02 31.70  23.40  27.55 
1998 03 32.00  23.10  27.55 
1998 04 32.09  23.10  27.59 
1998 05 31.20  23.10  27.15 
1998 06 30.30  22.40  26.34 
1998 07 29.20  22.30  25.75 
1998 08 28.70  21.70  25.20 
1998 09 28.10  21.70  24.90 
1998 10 27.40  21.20  24.30 
1998 11 27.70  21.10  24.40 
1998 12 28.40  20.90  24.65 
1999 01 28.80  21.10  24.95 
1999 02 29.30  21.60  25.45 
1999 03 30.70  21.80  26.25 
1999 04 29.80  22.00  25.90 
1999 05 29.70  22.20  25.95 
1999 06 27.30  21.30  24.30 
1999 07 27.20  20.80  24.00 
1999 08 27.70  20.40  24.05 
1999 09 27.50  21.00  24.25 
1999 10 27.30  21.00  24.15 
1999 11 27.10  20.80  23.95 
1999 12 27.80  21.30  24.55 
2000 01 28.30  21.10  24.70 
2000 02 29.50  21.50  25.50 
2000 03 29.90  21.70  25.80 
2000 04 30.30  22.10  26.20 
2000 05 28.30  21.90  25.09 
2000 06 27.70  21.60  24.65 
2000 07 27.00  20.50  23.75 
2000 08 28.10  20.50  24.30 
2000 09 27.60  20.60  24.10 
2000 10 27.70  21.10  24.40 
2000 11 28.30  20.40  24.34 
2000 12 28.40  21.50  24.95 
