1991 01 99.99  23.80 -99.99 
1991 02 99.99  23.70 -99.99 
1991 03 99.99  23.50 -99.99 
1991 04 99.99  23.50 -99.99 
1991 05 99.99  23.50 -99.99 
1991 06 99.99  22.70 -99.99 
1991 07 99.99  21.80 -99.99 
1991 08 99.99  22.30 -99.99 
1991 09 99.99  20.80 -99.99 
1991 10 99.99  22.00 -99.99 
1991 11 99.99  22.80 -99.99 
1991 12 99.99  23.60 -99.99 
1992 01 30.60  23.60  27.10 
1992 02 30.10  23.50  26.80 
1992 03 30.20  23.70  26.95 
1992 04 30.60  23.60  27.10 
1992 05 31.00  23.40  27.20 
1992 06 31.20  22.90  27.05 
1992 07 29.60  22.90  26.25 
1992 08 30.20  21.70  25.95 
1992 09 31.50  23.00  27.25 
1992 10 31.90  23.30  27.59 
1992 11 31.70  23.40  27.55 
1992 12 30.40  23.50  26.95 
1993 01 30.10  23.60  26.85 
1993 02 30.00  23.50  26.75 
1993 03 30.30  23.00  26.65 
1993 04 30.70  23.10  26.90 
1993 05 30.70  23.00  26.85 
1993 06 30.60  22.70  26.65 
1993 07 30.20  21.70  25.95 
1993 08 30.50  20.80  25.65 
1993 09 31.30  21.90  26.59 
1993 10 31.80  23.00  27.40 
1993 11 32.50  24.30  28.40 
1993 12 31.90  24.10  28.00 
1994 01 30.60  24.00  27.30 
1994 02 30.80  23.90  27.34 
1994 03 30.90  23.80  27.34 
1994 04 31.20  23.50  27.35 
1994 05 30.70  23.40  27.05 
1994 06 30.50  22.70  26.60 
1994 07 29.80  21.40  25.59 
1994 08 29.90  20.90  25.40 
1994 09 30.90  20.29  25.59 
1994 10 31.80  22.10  26.95 
1994 11 32.40  23.40  27.90 
1994 12 31.60  23.60  27.60 
1995 01 31.00  23.40  27.20 
1995 02 31.00  23.70  27.35 
1995 03 31.20  23.80  27.50 
1995 04 31.30  23.60  27.45 
1995 05 31.10  23.60  27.35 
1995 06 30.50  23.50  27.00 
1995 07 29.60  22.70  26.15 
1995 08 29.90  23.30  26.59 
1995 09 31.40  22.90  27.15 
1995 10 32.59  23.50  28.05 
1995 11 32.00  24.10  28.05 
1995 12 31.20  23.70  27.45 
1996 01 30.70  23.30  27.00 
1996 02 30.60  23.30  26.95 
1996 03 31.20  23.90  27.55 
1996 04 31.50  23.80  27.65 
1996 05 31.60  23.20  27.40 
1996 06 30.00  23.40  26.70 
1996 07 29.90  22.80  26.34 
1996 08 30.10  22.90  26.50 
1996 09 31.00  22.70  26.85 
1996 10 31.50  23.50  27.50 
1996 11 30.80  23.60  27.20 
1996 12 30.70  23.80  27.25 
1997 01 29.70  23.30  26.50 
1997 02 29.60  23.60  26.60 
1997 03 30.30  23.50  26.90 
1997 04 30.70  23.20  26.95 
1997 05 30.40  22.50  26.45 
1997 06 30.10  21.90  26.00 
1997 07 29.80  22.60  26.20 
1997 08 29.90  20.10  25.00 
1997 09 30.30  21.10  25.70 
1997 10 30.70  22.30  26.50 
1997 11 31.20  23.60  27.40 
1997 12 31.40  24.60  28.00 
1998 01 30.60  24.80  27.70 
1998 02 30.20  24.60  27.40 
1998 03 30.30  24.50  27.40 
1998 04 30.70  24.60  27.65 
1998 05 31.40  24.80  28.09 
1998 06 30.20  24.10  27.15 
1998 07 30.00  23.90  26.95 
1998 08 29.70  23.80  26.75 
1998 09 30.60  23.70  27.15 
1998 10 31.30  24.00  27.65 
1998 11 31.10  24.10  27.60 
1998 12 30.60  24.00  27.30 
1999 01 30.30  24.00  27.15 
1999 02 30.20  23.60  26.90 
1999 03 30.80  23.60  27.20 
1999 04 30.60  23.80  27.20 
1999 05 30.10  23.50  26.80 
1999 06 29.80  23.30  26.55 
1999 07 29.10  22.60  25.85 
1999 08 29.80  22.30  26.05 
1999 09 31.10  23.10  27.10 
1999 10 31.60  24.30  27.95 
1999 11 31.10  24.10  27.60 
1999 12 31.00  24.30  27.65 
2000 01 30.50  23.80  27.15 
2000 02 30.80  23.90  27.34 
2000 05 31.40  23.80  27.59 
2000 06 29.70  22.60  26.15 
2000 07 29.40  22.60  26.00 
2000 08 30.00  22.60  26.30 
2000 09 31.10  23.10  27.10 
2000 10 31.20  23.80  27.50 
2000 11 32.00  24.30  28.15 
2000 12 30.90  23.90  27.40 
