1987 01 99.99 -99.99  19.90 
1987 02 99.99 -99.99  21.00 
1987 03 99.99 -99.99  20.80 
1987 04 99.99 -99.99  20.50 
1987 05 99.99 -99.99  20.29 
1987 06 99.99 -99.99  20.50 
1987 07 99.99 -99.99  21.90 
1987 08 99.99 -99.99  22.30 
1987 10 99.99 -99.99  20.60 
1987 11 99.99 -99.99  19.90 
1987 12 99.99 -99.99  21.80 
1988 01 99.99 -99.99  20.40 
1988 02 99.99 -99.99  20.40 
1988 03 99.99 -99.99  20.29 
1988 04 99.99 -99.99  19.79 
1988 05 99.99 -99.99  20.60 
1989 02 99.99 -99.99  20.29 
1989 03 99.99 -99.99  19.40 
1989 04 99.99 -99.99  19.50 
1989 07 99.99 -99.99  20.40 
1989 08 99.99 -99.99  21.50 
1989 12 99.99 -99.99  19.20 
1990 02 99.99 -99.99  19.79 
1990 03 99.99 -99.99  19.70 
1990 05 99.99 -99.99  20.40 
1990 06 99.99 -99.99  21.20 
1990 07 99.99 -99.99  21.10 
1990 08 99.99 -99.99  21.60 
1991 02 99.99 -99.99  20.20 
1991 04 99.99 -99.99  19.60 
1991 08 99.99 -99.99  21.60 
1991 10 99.99 -99.99  19.40 
1991 11 99.99 -99.99  19.50 
1992 01 99.99 -99.99  21.10 
1992 04 99.99 -99.99  20.70 
1992 05 99.99 -99.99  20.50 
1992 07 99.99 -99.99  20.90 
1993 01 99.99 -99.99  19.79 
1993 02 99.99 -99.99  20.50 
1993 06 99.99 -99.99  20.90 
1993 07 99.99 -99.99  21.10 
1993 08 99.99 -99.99  21.30 
1993 11 99.99 -99.99  20.10 
1993 12 99.99 -99.99  20.29 
1994 01 99.99 -99.99  22.00 
1994 02 99.99 -99.99  20.40 
1995 05 99.99 -99.99  20.10 
1995 06 99.99 -99.99  20.70 
1995 07 99.99 -99.99  20.80 
1995 08 99.99 -99.99  22.10 
1995 09 99.99 -99.99  21.30 
1995 11 99.99 -99.99  19.90 
1996 01 99.99 -99.99  20.20 
1996 02 99.99 -99.99  19.60 
1996 03 99.99 -99.99  20.10 
1996 05 99.99 -99.99  20.40 
1996 06 99.99 -99.99  20.20 
1996 07 99.99 -99.99  20.20 
1996 08 99.99 -99.99  20.70 
1996 09 99.99 -99.99  20.20 
1996 10 99.99 -99.99  19.70 
1996 11 99.99 -99.99  19.20 
1996 12 99.99 -99.99  20.40 
1997 02 99.99 -99.99  21.10 
1997 03 27.80  15.80  21.80 
1997 04 26.00  15.80  20.90 
1997 06 26.80  15.10  20.95 
1997 07 27.10  14.90  21.00 
1997 08 29.20  15.90  22.55 
1997 09 30.90  16.10  23.50 
1997 10 27.70  16.40  22.05 
1997 11 25.30  16.50  20.90 
1997 12 25.50  16.20  20.85 
1998 01 26.50  16.50  21.50 
1998 02 27.50  17.10  22.30 
1998 03 27.80  16.70  22.25 
1998 04 26.80  16.79  21.80 
1998 05 26.40  17.00  21.70 
1998 06 27.00  15.20  21.10 
1998 07 27.10  15.40  21.25 
1998 08 28.80  16.00  22.40 
1998 09 28.20  15.90  22.05 
1998 10 27.60  15.80  21.70 
1998 11 27.60  15.50  21.55 
1998 12 27.20  15.20  21.20 
1999 01 27.00  15.50  21.25 
1999 02 30.00  15.70  22.85 
1999 03 26.40  15.60  21.00 
1999 04 26.00  15.80  20.90 
1999 05 25.90  15.50  20.70 
1999 06 27.20  15.20  21.20 
1999 07 27.40  15.10  21.25 
1999 08 27.20  16.60  21.90 
1999 09 27.80  15.60  21.70 
1999 10 28.10  15.60  21.85 
1999 11 26.20  15.40  20.80 
1999 12 26.20  15.60  20.90 
2000 01 27.90  15.30  21.60 
2000 02 28.00  15.20  21.60 
2000 03 26.80  15.50  21.15 
2000 04 26.70  15.90  21.30 
2000 06 27.30  15.70  21.50 
2000 07 28.20  15.40  21.80 
2000 08 29.10  17.20  23.15 
2000 09 29.90  17.20  23.55 
2000 10 28.20  16.70  22.45 
2001 02 27.50  15.00  21.25 
2001 03 26.50 -99.99 -99.99 
2001 04 26.70  16.70  21.70 
2001 06 26.40  15.50  20.95 
2001 07 27.10  15.40  21.25 
2001 09 28.00  16.79  22.40 
2001 11 26.60  15.60  21.10 
2001 12 27.20  16.20  21.70 
2002 01 30.10  22.90  26.50 
2002 05 26.50  17.00  21.75 
2003 06 27.20  16.20  21.70 
2003 07 28.00  15.60  21.80 
2003 08 29.00  16.29  22.65 
