1987 01 99.99 -99.99  26.90 
1987 02 99.99 -99.99  26.80 
1987 03 99.99 -99.99  28.70 
1987 04 99.99 -99.99  28.00 
1987 05 99.99 -99.99  26.60 
1987 06 99.99 -99.99  23.40 
1987 07 99.99 -99.99  24.80 
1987 08 99.99 -99.99  24.70 
1987 09 99.99 -99.99  25.40 
1987 10 99.99 -99.99  26.50 
1987 11 99.99 -99.99  28.50 
1987 12 99.99 -99.99  27.50 
1988 01 99.99 -99.99  28.60 
1988 02 99.99 -99.99  28.80 
1988 03 99.99 -99.99  23.80 
1988 04 99.99 -99.99  27.70 
1988 05 99.99 -99.99  26.80 
1988 07 99.99 -99.99  25.10 
1988 08 99.99 -99.99  25.70 
1988 09 99.99 -99.99  25.70 
1988 10 99.99 -99.99  26.50 
1988 11 99.99 -99.99  26.80 
1988 12 99.99 -99.99  27.70 
1989 01 99.99 -99.99  27.20 
1989 02 99.99 -99.99  27.50 
1989 03 99.99 -99.99  29.00 
1989 04 99.99 -99.99  27.40 
1989 05 99.99 -99.99  25.80 
1989 07 99.99 -99.99  24.50 
1989 08 99.99 -99.99  24.40 
1989 09 99.99 -99.99  25.70 
1989 10 99.99 -99.99  25.80 
1989 11 99.99 -99.99  26.70 
1989 12 99.99 -99.99  27.10 
1990 01 99.99 -99.99  27.00 
1990 02 99.99 -99.99  28.60 
1990 03 99.99 -99.99  28.30 
1990 04 99.99 -99.99  27.90 
1990 05 99.99 -99.99  27.10 
1990 06 99.99 -99.99  25.10 
1990 07 99.99 -99.99  25.10 
1990 09 99.99 -99.99  25.90 
1990 10 99.99 -99.99  28.50 
1991 04 99.99 -99.99  27.60 
1991 05 99.99 -99.99  26.00 
1991 06 99.99 -99.99  25.10 
1991 07 99.99 -99.99  24.90 
1991 08 99.99 -99.99  25.50 
1991 11 99.99 -99.99  27.40 
1991 12 99.99 -99.99  27.60 
1992 01 99.99 -99.99  27.30 
1992 02 99.99 -99.99  28.00 
1992 03 99.99 -99.99  28.50 
1992 04 99.99 -99.99  28.10 
1992 05 99.99 -99.99  26.30 
1992 06 99.99 -99.99  25.70 
1992 07 99.99 -99.99  24.50 
1992 08 99.99 -99.99  24.50 
1992 09 99.99 -99.99  25.30 
1992 10 99.99 -99.99  26.10 
1992 11 99.99 -99.99  27.30 
1992 12 99.99 -99.99  27.50 
1993 01 99.99 -99.99  27.10 
1993 02 99.99 -99.99  27.60 
1993 03 99.99 -99.99  28.00 
1993 04 99.99 -99.99  28.40 
1993 05 99.99 -99.99  26.90 
1993 06 99.99 -99.99  25.40 
1993 07 99.99 -99.99  24.50 
1993 08 99.99 -99.99  25.60 
1993 09 99.99 -99.99  25.20 
1993 10 99.99 -99.99  26.30 
1994 01 99.99 -99.99  28.00 
1994 02 99.99 -99.99  27.60 
1994 03 99.99 -99.99  29.10 
1994 04 99.99 -99.99  27.90 
1994 05 99.99 -99.99  25.90 
1994 06 99.99 -99.99  25.70 
1994 07 99.99 -99.99  23.80 
1994 08 99.99 -99.99  25.20 
1994 09 99.99 -99.99  25.10 
1994 10 99.99 -99.99  26.30 
1994 11 99.99 -99.99  26.50 
1994 12 99.99 -99.99  27.10 
1995 01 99.99 -99.99  27.00 
1995 02 99.99 -99.99  27.60 
1995 03 99.99 -99.99  28.50 
1995 04 99.99 -99.99  28.10 
1995 05 99.99 -99.99  26.50 
1995 06 99.99 -99.99  26.10 
1995 07 99.99 -99.99  25.30 
1995 08 99.99 -99.99  25.10 
1995 09 99.99 -99.99  25.30 
1995 10 99.99 -99.99  26.90 
1995 11 99.99 -99.99  26.60 
1995 12 99.99 -99.99  27.20 
1996 01 99.99 -99.99  28.00 
1996 02 99.99 -99.99  28.20 
1996 03 99.99 -99.99  28.80 
1996 04 99.99 -99.99  27.60 
1996 05 99.99 -99.99  26.00 
1996 06 99.99 -99.99  25.90 
1996 10 99.99 -99.99  26.10 
1997 02 99.99 -99.99  27.40 
1997 03 99.99 -99.99  27.40 
1997 04 99.99 -99.99  27.90 
1997 05 99.99 -99.99  26.90 
1997 06 99.99 -99.99  25.40 
1997 09 99.99 -99.99  25.80 
1997 10 99.99 -99.99  25.60 
1998 01 99.99 -99.99  27.50 
1998 04 99.99 -99.99  28.40 
1998 05 99.99 -99.99  27.50 
1998 06 99.99 -99.99  26.10 
1998 07 99.99 -99.99  25.30 
1998 08 99.99 -99.99  25.30 
1998 09 99.99 -99.99  25.90 
1998 10 99.99 -99.99  26.40 
1998 11 99.99 -99.99  27.80 
1998 12 99.99 -99.99  27.80 
1999 01 99.99 -99.99  27.80 
1999 02 99.99 -99.99  27.90 
1999 03 99.99 -99.99  28.90 
1999 05 99.99 -99.99  26.40 
1999 08 99.99 -99.99  24.60 
1999 09 99.99 -99.99  25.10 
1999 10 99.99 -99.99  25.50 
1999 11 99.99 -99.99  26.10 
2000 01 99.99 -99.99  27.20 
2000 02 99.99 -99.99  26.90 
2000 03 99.99 -99.99  28.50 
2000 05 99.99 -99.99  26.00 
2000 12 99.99 -99.99  27.80 
2001 01 99.99 -99.99  27.50 
2001 02 99.99 -99.99  29.10 
2001 05 99.99 -99.99  26.80 
2001 08 99.99 -99.99  25.00 
2001 10 99.99 -99.99  26.40 
2001 11 99.99 -99.99  27.10 
2001 12 99.99 -99.99  28.20 
2002 01 99.99 -99.99  27.90 
2002 02 99.99 -99.99  26.70 
2002 03 99.99 -99.99  30.10 
2002 04 99.99 -99.99  27.70 
2002 05 99.99 -99.99  27.00 
2002 06 99.99 -99.99  26.00 
2002 07 99.99 -99.99  25.50 
2002 09 99.99 -99.99  25.50 
2002 10 99.99 -99.99  26.90 
2002 12 99.99 -99.99  27.60 
2003 02 99.99 -99.99  27.40 
2003 03 99.99 -99.99  29.60 
2003 04 99.99 -99.99  28.60 
2003 05 99.99 -99.99  27.20 
2003 06 99.99 -99.99  26.20 
2003 11 99.99 -99.99  26.70 
2003 12 99.99 -99.99  27.40 
2004 09 99.99 -99.99  25.60 
2004 10 99.99 -99.99  26.50 
2005 04 99.99 -99.99  28.40 
2005 11 99.99 -99.99  27.80 
2006 02 99.99 -99.99  28.60 
2006 03 99.99 -99.99  28.90 
2006 04 99.99 -99.99  27.70 
2006 05 99.99 -99.99  26.40 
2006 06 99.99 -99.99  25.50 
2006 08 99.99 -99.99  25.10 
2006 09 99.99 -99.99  25.40 
