1981 01 29.20  24.10  26.65 
1981 02 29.30  25.90  27.59 
1981 03 29.80  27.50  28.65 
1981 04 31.90  27.60  29.75 
1981 05 31.40  27.50  29.45 
1981 06 30.10  27.30  28.70 
1981 07 30.00  26.50  28.25 
1981 08 29.60  27.00  28.30 
1981 09 30.80  25.80  28.30 
1981 10 30.40  26.50  28.45 
1981 11 29.30  25.10  27.20 
1981 12 27.40  22.40  24.90 
1982 01 29.30  24.10  26.70 
1982 02 29.90  26.50  28.20 
1982 03 29.20  27.30  28.25 
1982 04 31.60  27.40  29.50 
1982 05 31.60  27.60  29.60 
1982 06 30.80  27.30  29.05 
1982 07 30.40  26.60  28.50 
1982 08 29.30  26.40  27.84 
1982 09 29.50  26.40  27.95 
1982 10 31.10  25.80  28.45 
1982 11 31.60  26.70  29.15 
1982 12 28.20  22.60  25.40 
1983 01 28.60  23.60  26.10 
1983 02 28.40  26.30  27.34 
1983 03 29.60  27.30  28.45 
1983 04 31.00  28.70  29.85 
1983 05 31.80  28.50  30.15 
1983 06 31.30  27.80  29.55 
1983 07 31.20  27.10  29.15 
1983 08 30.70  25.90  28.30 
1983 09 30.80  26.30  28.55 
1983 10 30.50  25.80  28.15 
1983 11 29.20  23.90  26.55 
1983 12 28.90  23.30  26.09 
1984 01 28.70  23.70  26.20 
1984 02 29.80  26.00  27.90 
1984 03 30.30  27.20  28.75 
1984 04 31.40  28.60  30.00 
1984 05 31.80  27.90  29.84 
1984 06 30.00  27.40  28.70 
1984 07 30.30  26.90  28.59 
1984 08 30.20  27.40  28.80 
1984 09 30.60  26.00  28.30 
1984 10 30.60  25.80  28.20 
1984 11 30.90  25.70  28.30 
1984 12 30.10  24.60  27.35 
1985 01 29.90  25.60  27.75 
1985 02 29.70  27.10  28.40 
1985 03 30.80  27.70  29.25 
1985 04 31.30  27.70  29.50 
1985 05 99.99  26.80 -99.99 
1985 06 30.00  27.50  28.75 
1985 07 29.70  26.40  28.05 
1985 08 29.80  26.90  28.34 
1985 09 30.10  25.80  27.95 
1985 10 30.50  25.80  28.15 
1985 11 30.80  25.90  28.34 
1985 12 29.90  23.70  26.80 
1986 01 28.50  22.90  25.70 
1986 02 29.00  26.00  27.50 
1986 03 29.20  26.00  27.60 
1986 04 31.00  28.00  29.50 
1986 05 31.10  27.70  29.40 
1986 06 30.80  27.20  29.00 
1986 07 30.30  26.40  28.34 
1986 08 30.60  26.80  28.70 
1986 09 31.30  26.00  28.65 
1986 10 31.30  25.70  28.50 
1986 11 30.40  25.60  28.00 
1986 12 29.70  24.00  26.85 
1987 01 29.90  24.80  27.34 
1987 02 29.20  26.00  27.60 
1987 03 30.00  26.70  28.35 
1987 04 31.70  28.20  29.95 
1987 05 31.80  28.60  30.20 
1987 06 31.20  27.80  29.50 
1987 07 31.20  28.20  29.70 
1987 08 31.00  27.30  29.15 
1987 09 30.60  26.10  28.35 
1987 10 31.50  26.50  29.00 
1987 11 31.00  25.90  28.45 
1987 12 28.10  22.00  25.05 
1988 01 30.10  25.30  27.70 
1988 02 30.00  26.90  28.45 
1988 03 30.70  28.20  29.45 
1988 04 31.70  28.30  30.00 
1988 05 31.20  27.00  29.10 
1988 06 31.00  27.60  29.30 
1988 07 30.80  26.20  28.50 
1988 08 30.50 -99.99 -99.99 
1988 09 30.70  25.80  28.25 
1988 10 30.10  26.00  28.05 
1988 11 28.90  24.00  26.45 
1988 12 29.20  23.10  26.15 
1989 01 29.60  25.50  27.55 
1989 02 28.80  26.10  27.45 
1989 03 29.80  26.70  28.25 
1989 04 31.50  28.60  30.05 
1989 05 31.50  27.50  29.50 
1989 06 30.70  26.70  28.70 
1989 07 30.70  27.20  28.95 
1989 08 30.50  26.80  28.65 
1989 09 30.90  26.40  28.65 
1989 10 30.80  25.90  28.34 
1989 11 30.70  25.60  28.15 
1989 12 28.90  23.40  26.15 
1990 01 29.80  26.00  27.90 
1990 02 29.50  26.80  28.15 
1990 03 30.60  27.40  29.00 
1990 04 31.80  28.30  30.05 
1990 05 31.50  27.30  29.40 
1990 06 31.30  28.20  29.75 
1990 07 30.60  27.10  28.85 
1990 08 30.90  27.20  29.05 
1990 09 30.50  26.40  28.45 
1990 10 30.50  25.80  28.15 
1990 11 29.90  25.70  27.80 
1990 12 29.60  24.30  26.95 
1991 01 30.40  26.70  28.55 
1991 02 30.40  26.50  28.45 
1991 03 30.30  27.90  29.09 
1991 04 31.30  28.00  29.65 
1991 05 31.80  28.00  29.90 
1991 06 31.00  27.40  29.20 
1991 07 30.60  27.00  28.80 
1991 08 30.10  27.10  28.60 
1991 09 30.50  26.40  28.45 
1991 10 30.30  25.80  28.05 
1991 11 30.00  25.10  27.55 
1991 12 29.50  24.50  27.00 
1992 01 28.30  23.80  26.05 
1992 02 29.10  25.50  27.30 
1992 03 29.90  27.30  28.59 
1992 04 31.50  28.90  30.20 
1992 05 32.09  28.60  30.34 
1992 06 31.60  27.10  29.35 
1992 07 30.50  26.70  28.60 
1992 08 30.40  26.90  28.65 
1992 09 30.50  26.60  28.55 
1992 10 29.50  24.80  27.15 
1992 11 29.00  24.20  26.60 
1992 12 29.00  24.20  26.60 
1993 01 29.00  24.50  26.75 
1993 02 28.40  24.90  26.65 
1993 03 29.40  26.50  27.95 
1993 04 30.80  27.70  29.25 
1993 05 31.00  27.60  29.30 
1993 06 31.50  28.00  29.75 
1993 07 30.90  28.00  29.45 
1993 08 30.20  26.30  28.25 
1993 09 30.20  25.80  28.00 
1993 10 30.50  25.70  28.10 
1993 11 30.70  26.00  28.35 
1993 12 28.20  23.20  25.70 
1994 01 29.30  25.20  27.25 
1994 02 29.60  26.80  28.20 
1994 03 30.20  26.40  28.30 
1994 04 31.50  28.20  29.85 
1994 05 31.40  27.50  29.45 
1994 06 30.50  27.20  28.85 
1994 07 29.60  27.10  28.35 
1994 08 29.30  26.50  27.90 
1994 09 29.90  26.20  28.05 
1994 10 30.10  25.50  27.80 
1994 11 30.10  25.60  27.85 
1994 12 30.10  25.30  27.70 
1995 01 29.00  24.90  26.95 
1995 02 28.50  25.20  26.85 
1995 03 29.90  27.60  28.75 
1995 04 31.00  28.70  29.85 
1995 05 31.20  27.50  29.35 
1995 06 31.00  27.90  29.45 
1995 07 30.10  26.70  28.40 
1995 08 30.30  26.30  28.30 
1995 09 29.70  25.40  27.55 
1995 10 30.10  26.10  28.10 
1995 11 29.70  25.30  27.50 
1995 12 27.90  23.20  25.55 
1996 01 28.40  24.50  26.45 
1996 02 28.60  24.40  26.50 
1996 03 29.20  27.10  28.15 
1996 04 30.90  27.40  29.15 
1996 05 31.20  27.00  29.10 
1996 06 30.90  27.00  28.95 
1996 07 30.00  26.90  28.45 
1996 08 30.10  27.00  28.55 
1996 09 29.60  25.90  27.75 
1996 10 30.20  25.70  27.95 
1996 11 29.80  25.80  27.80 
1996 12 28.40  23.50  25.95 
1997 01 28.10  24.20  26.15 
1997 02 29.70  26.00  27.85 
1997 03 29.90  26.30  28.09 
1997 04 31.00  27.40  29.20 
1997 05 31.50  28.50  30.00 
1997 06 31.20  28.10  29.65 
1997 07 29.90  27.40  28.65 
1997 08 29.90  27.50  28.70 
1997 09 30.60  26.20  28.40 
1997 10 31.60  26.20  28.90 
1997 11 30.70  26.40  28.55 
1997 12 30.60  26.40  28.50 
1998 01 30.70  26.90  28.80 
1998 02 30.40  27.90  29.15 
1998 03 31.10  28.70  29.90 
1998 04 31.70  28.80  30.25 
1998 05 32.20  28.40  30.30 
1998 06 31.60  27.70  29.65 
1998 07 31.10  26.80  28.95 
1998 08 31.20  26.50  28.85 
1998 09 30.50  26.60  28.55 
1998 10 30.80  26.70  28.75 
1998 11 29.70  25.20  27.45 
1998 12 28.50  24.30  26.40 
1999 01 29.00  24.80  26.90 
1999 02 29.70  25.50  27.60 
1999 03 30.40  27.50  28.95 
1999 04 30.70  27.00  28.85 
1999 05 30.10  26.40  28.25 
1999 06 30.20  26.80  28.50 
1999 07 30.20  27.20  28.70 
1999 08 29.80  26.30  28.05 
1999 09 30.30  26.00  28.15 
1999 10 30.00  25.30  27.65 
1999 11 29.80  25.50  27.65 
1999 12 26.30  21.60  23.95 
2000 01 28.80  24.60  26.70 
2000 02 29.00  25.00  27.00 
2000 03 30.00  26.90  28.45 
2000 04 30.70  26.90  28.80 
2000 05 31.20  27.80  29.50 
2000 06 30.30  26.70  28.50 
2000 07 30.10  26.30  28.20 
2000 08 30.10  26.60  28.35 
2000 09 30.50  25.90  28.20 
2000 10 30.60  25.90  28.25 
2000 11 29.70  24.70  27.20 
2000 12 30.10  25.70  27.90 
