1987 10 99.99  24.80 -99.99 
1988 04 99.99  24.50 -99.99 
1988 05 99.99  24.80 -99.99 
1988 06 99.99  24.00 -99.99 
1988 07 99.99  24.20 -99.99 
1988 08 99.99  24.40 -99.99 
1988 11 99.99  23.80 -99.99 
1989 01 99.99  23.80 -99.99 
1989 02 99.99  22.80 -99.99 
1989 03 99.99  23.50 -99.99 
1989 09 99.99  23.50 -99.99 
1989 11 99.99  23.50 -99.99 
1990 03 99.99  23.90 -99.99 
1990 12 99.99  23.00 -99.99 
1991 01 99.99  23.30 -99.99 
1991 02 99.99  23.40 -99.99 
1991 08 99.99  23.20 -99.99 
1991 09 99.99  22.60 -99.99 
1991 10 99.99  23.30 -99.99 
1992 02 99.99  23.90 -99.99 
1992 03 99.99  24.30 -99.99 
1993 01 99.99  24.00 -99.99 
1995 04 99.99  24.60 -99.99 
1995 05 99.99  25.00 -99.99 
1995 06 99.99  24.50 -99.99 
1995 07 99.99  24.50 -99.99 
1995 08 99.99  24.50 -99.99 
1995 09 99.99  24.40 -99.99 
1995 10 99.99  24.80 -99.99 
1995 11 99.99  24.70 -99.99 
1995 12 99.99  23.90 -99.99 
1996 01 99.99  23.70 -99.99 
1996 02 99.99  23.60 -99.99 
1996 03 99.99  23.70 -99.99 
1996 04 99.99  23.70 -99.99 
1996 05 99.99  24.50 -99.99 
1996 06 99.99  24.60 -99.99 
1996 07 99.99  24.50 -99.99 
1996 08 99.99  24.80 -99.99 
1996 09 99.99  24.70 -99.99 
1996 10 99.99  24.50 -99.99 
1996 11 99.99  24.50 -99.99 
1996 12 99.99  24.00 -99.99 
1997 01 99.99  24.00 -99.99 
1997 02 99.99  23.60 -99.99 
1997 03 99.99  24.20 -99.99 
1997 04 99.99  25.10 -99.99 
1997 05 99.99  24.80 -99.99 
1997 06 99.99  24.80 -99.99 
1997 07 30.60  24.60  27.60 
1997 08 99.99  23.90 -99.99 
1997 09 99.99  24.40 -99.99 
1997 10 99.99  25.00 -99.99 
1997 11 99.99  25.30 -99.99 
1997 12 99.99  25.10 -99.99 
1998 02 99.99  25.80 -99.99 
1998 03 99.99  25.90 -99.99 
1998 04 99.99  25.40 -99.99 
1998 05 99.99  26.00 -99.99 
1998 06 99.99  25.20 -99.99 
1998 07 99.99  24.20 -99.99 
1998 08 99.99  24.40 -99.99 
1998 09 99.99  24.70 -99.99 
1998 10 99.99  24.80 -99.99 
1998 11 99.99  24.30 -99.99 
1998 12 99.99  24.30 -99.99 
1999 02 99.99  24.30 -99.99 
1999 03 99.99  24.20 -99.99 
1999 04 99.99  24.80 -99.99 
1999 05 99.99  24.80 -99.99 
1999 06 99.99  24.40 -99.99 
1999 08 99.99  24.30 -99.99 
1999 09 99.99  24.40 -99.99 
1999 10 31.00  24.50  27.75 
2000 05 31.40  24.70  28.05 
2000 08 31.20  24.50  27.85 
2000 09 32.70  24.90  28.80 
2001 01 31.00  23.90  27.45 
2001 02 31.40  24.30  27.84 
2001 03 31.50  24.40  27.95 
2001 06 30.60  25.00  27.80 
2001 11 33.09  24.60  28.84 
2002 04 31.60  24.80  28.20 
2002 05 31.50  25.00  28.25 
2003 02 31.90  24.50  28.20 
2003 07 30.50  24.70  27.60 
2003 08 25.30    .30  12.79 
2003 10 32.09  25.10  28.59 
2004 03 31.20  24.50  27.85 
