1991 01 30.40  24.80  27.59 
1991 02 31.10  25.60  28.35 
1991 03 30.90  25.00  27.95 
1991 04 31.50  25.20  28.35 
1991 05 31.50  24.80  28.15 
1991 06 31.10  25.30  28.20 
1991 07 31.00  24.70  27.85 
1991 08 31.00  24.90  27.95 
1991 09 30.30  24.00  27.15 
1991 10 30.50  24.50  27.50 
1991 11 30.30  24.80  27.55 
1991 12 29.80  24.30  27.05 
1992 01 30.00  24.30  27.15 
1992 02 30.80  26.00  28.40 
1992 03 31.40  25.00  28.20 
1992 04 31.50  25.50  28.50 
1992 05 31.50  25.30  28.40 
1992 06 31.10  25.00  28.05 
1992 07 30.70  24.30  27.50 
1992 08 30.70  24.00  27.35 
1992 09 30.50  23.90  27.20 
1992 10 30.20  24.60  27.40 
1992 11 29.90  24.30  27.09 
1992 12 30.20  24.80  27.50 
1993 01 30.10  24.60  27.35 
1993 02 30.20  24.40  27.30 
1993 03 30.90  24.90  27.90 
1993 04 31.60  25.70  28.65 
1993 05 30.80  24.50  27.65 
1993 06 31.10  25.00  28.05 
1993 07 30.30  24.20  27.25 
1993 08 30.00  23.90  26.95 
1993 09 30.00  24.00  27.00 
1993 10 30.20  24.40  27.30 
1993 11 30.20  24.70  27.45 
1993 12 30.40  24.30  27.34 
1994 01 30.20  24.00  27.10 
1994 02 31.10  25.90  28.50 
1994 03 31.90  25.60  28.75 
1994 04 31.80  24.30  28.05 
1994 05 31.20  24.00  27.60 
1994 06 31.00  24.80  27.90 
1994 07 31.20  24.60  27.90 
1994 08 31.20  24.20  27.70 
1994 09 30.50  24.00  27.25 
1994 10 30.60  23.80  27.20 
1994 11 30.50  23.10  26.80 
1994 12 30.40  24.20  27.30 
1995 01 30.80  24.70  27.75 
1995 02 31.10  25.10  28.10 
1995 03 31.90  25.30  28.59 
1995 04 31.60  25.10  28.35 
1995 05 31.30  25.10  28.20 
1995 06 31.00  24.60  27.80 
1995 07 30.90  24.70  27.80 
1995 08 30.10  24.10  27.10 
1995 09 30.20  24.30  27.25 
1995 10 30.30  24.60  27.45 
1995 11 30.40  24.50  27.45 
1995 12 30.20  23.70  26.95 
1996 01 30.70  24.70  27.70 
1996 02 31.30  25.40  28.34 
1996 03 31.20  25.30  28.25 
1996 04 31.40  24.80  28.09 
1996 05 31.10  24.80  27.95 
1996 06 30.80  24.80  27.80 
1996 07 30.00  23.90  26.95 
1996 08 30.10  23.70  26.90 
1996 09 30.00  24.30  27.15 
1996 10 30.00  23.80  26.90 
1996 11 30.20  23.20  26.70 
1996 12 30.90  24.90  27.90 
1997 01 30.70  25.70  28.20 
1997 02 31.10  25.90  28.50 
1997 03 31.60  24.60  28.10 
1997 04 31.30  24.90  28.09 
1997 05 30.80  25.00  27.90 
1997 06 31.40  25.30  28.34 
1997 07 31.00  24.90  27.95 
1997 08 30.70  24.50  27.60 
1997 09 30.40  24.70  27.55 
1997 10 31.00  25.30  28.15 
1997 11 31.20  25.50  28.35 
1997 12 30.30  24.40  27.34 
1998 01 31.00  25.30  28.15 
1998 02 31.60  26.50  29.05 
1998 03 31.70  25.30  28.50 
1998 04 32.40  26.00  29.20 
1998 05 31.90  25.80  28.84 
1998 06 31.80  26.00  28.90 
1998 07 31.00  24.90  27.95 
1998 08 30.50  24.20  27.35 
1998 09 30.90  25.20  28.05 
1998 10 30.30  24.30  27.30 
1998 11 30.30  24.30  27.30 
1998 12 30.20  24.40  27.30 
1999 01 30.00  24.00  27.00 
1999 02 31.10  24.50  27.80 
1999 03 31.50  25.40  28.45 
1999 04 31.50  25.20  28.35 
1999 05 31.00  24.70  27.85 
1999 06 30.90  24.70  27.80 
1999 07 30.80  24.60  27.70 
1999 08 30.60  23.60  27.10 
1999 09 30.50  24.40  27.45 
1999 10 30.40  24.40  27.40 
1999 11 30.70  24.80  27.75 
1999 12 30.70  24.80  27.75 
2000 01 30.50  23.90  27.20 
2000 02 31.00  25.30  28.15 
2000 03 31.50  25.10  28.30 
2000 04 31.60  25.30  28.45 
2000 05 31.60  25.10  28.35 
2000 06 30.60  24.30  27.45 
2000 07 30.60  24.30  27.45 
2000 08 30.60  24.20  27.40 
2000 09 29.90  23.40  26.65 
2000 10 30.70  24.10  27.40 
2000 11 30.30  24.00  27.15 
2000 12 30.60  23.50  27.05 
