1997 01 30.70  24.70  27.70 
1997 03 29.80  23.10  26.45 
1997 04 29.30  25.00  27.15 
1997 05 30.40  23.40  26.90 
1997 06 28.00  24.20  26.10 
1997 07 27.80  23.80  25.80 
1997 08 27.20  23.10  25.15 
1997 10 29.10  24.00  26.55 
1997 11 29.90  23.90  26.90 
1997 12 30.80  25.00  27.90 
1998 01 32.00  25.40  28.70 
1998 02 31.90  25.30  28.59 
1998 03 31.20  24.40  27.80 
1998 04 31.10  25.70  28.40 
1998 05 30.30  25.00  27.65 
1998 06 26.30  25.00  25.65 
1998 07 29.20  24.70  26.95 
1998 08 29.30  24.60  26.95 
1998 09 29.80  24.70  27.25 
1998 10 30.70  24.90  27.80 
1998 11 30.90  24.10  27.50 
1998 12 31.00  25.00  28.00 
1999 01 31.80  24.30  28.05 
1999 02 30.70  24.30  27.50 
1999 03 31.00  24.60  27.80 
1999 04 31.20  24.40  27.80 
1999 05 29.80  24.50  27.15 
1999 06 28.80  24.50  26.65 
1999 09 28.40  23.50  25.95 
1999 10 30.10  24.90  27.50 
1999 11 30.60  24.30  27.45 
2000 01 31.30  23.60  27.45 
2000 02 31.10  24.10  27.60 
2000 03 30.80  23.70  27.25 
2000 04 30.10  24.30  27.20 
2000 05 29.80  23.80  26.80 
2000 06 28.80  24.00  26.40 
2000 07 27.50  23.40  25.45 
2000 08 28.50  23.50  26.00 
2000 09 31.40  23.20  27.30 
2000 10 30.00  24.20  27.10 
2000 11 30.30  24.30  27.30 
2000 12 31.00  24.70  27.85 
2001 01 31.50  24.50  28.00 
2001 02 30.80  24.30  27.55 
2001 03 30.90  24.40  27.65 
2001 05 29.10  24.10  26.60 
2001 06 28.20  24.00  26.10 
2001 07 28.00  23.40  25.70 
2001 08 28.20  23.00  25.60 
2001 09 29.40  24.70  27.05 
2001 10 29.70  24.70  27.20 
2001 11 31.10  25.30  28.20 
2001 12 31.20  25.50  28.35 
2002 02 31.10  24.30  27.70 
2002 03 30.60  24.60  27.60 
2002 04 30.30  24.80  27.55 
2002 05 29.40  24.30  26.84 
2002 06 29.00  24.60  26.80 
2002 07 27.50  23.20  25.35 
2002 08 27.80  22.90  25.34 
2002 11 29.60  24.10  26.85 
2003 01 30.70  24.30  27.50 
2003 02 31.50  24.20  27.85 
2003 03 31.00  24.60  27.80 
2003 07 28.00  23.90  25.95 
2003 08 28.20  24.70  26.45 
2003 10 30.00  25.00  27.50 
2003 11 29.90  24.70  27.30 
2003 12 31.30  25.20  28.25 
2004 01 31.50  24.70  28.10 
2004 02 31.20  24.90  28.05 
2004 03 31.00  24.30  27.65 
2004 04 30.10  24.60  27.35 
2004 06 28.30  23.70  26.00 
2004 07 27.70  23.40  25.55 
2004 08 27.60  23.10  25.35 
2004 09 28.60  23.60  26.10 
