1976 01 99.99 -99.99  27.50 
1976 02 99.99 -99.99  26.60 
1976 03 99.99 -99.99  26.50 
1976 04 99.99 -99.99  25.50 
1976 05 99.99 -99.99  26.50 
1976 06 99.99 -99.99  26.10 
1976 07 99.99 -99.99  26.00 
1976 08 99.99 -99.99  26.60 
1976 09 99.99 -99.99  26.50 
1976 10 99.99 -99.99  25.70 
1976 12 99.99 -99.99  25.70 
1977 01 99.99 -99.99  26.00 
1977 02 99.99 -99.99  25.40 
1977 03 99.99 -99.99  25.80 
1977 04 99.99 -99.99  25.60 
1977 05 99.99 -99.99  26.10 
1977 06 99.99 -99.99  25.20 
1977 07 99.99 -99.99  26.40 
1977 08 99.99 -99.99  26.40 
1977 11 99.99 -99.99  26.60 
1977 12 99.99 -99.99  25.50 
1978 02 99.99 -99.99  26.30 
1978 03 99.99 -99.99  26.00 
1978 04 99.99 -99.99  26.00 
1978 05 99.99 -99.99  26.80 
1978 06 99.99 -99.99  26.00 
1978 07 99.99 -99.99  25.90 
1978 09 99.99 -99.99  25.40 
1978 10 99.99 -99.99  25.70 
1978 11 99.99 -99.99  25.30 
1978 12 99.99 -99.99  25.50 
1979 01 99.99 -99.99  25.70 
1979 02 99.99 -99.99  25.90 
1979 03 99.99 -99.99  26.10 
1979 04 99.99 -99.99  25.60 
1979 05 99.99 -99.99  26.50 
1979 06 99.99 -99.99  26.70 
1979 07 99.99 -99.99  26.00 
1979 08 99.99 -99.99  25.00 
1979 09 99.99 -99.99  25.90 
1979 10 99.99 -99.99  25.80 
1979 11 99.99 -99.99  25.00 
1979 12 99.99 -99.99  25.20 
1980 01 99.99 -99.99  26.60 
1980 02 99.99 -99.99  26.50 
1980 03 99.99 -99.99  25.50 
1980 04 99.99 -99.99  26.00 
1980 07 99.99 -99.99  26.10 
1980 08 99.99 -99.99  25.30 
1980 09 99.99 -99.99  26.70 
1980 10 99.99 -99.99  26.10 
1980 12 99.99 -99.99  24.50 
1981 01 99.99 -99.99  25.50 
1981 02 99.99 -99.99  26.20 
1981 03 99.99 -99.99  25.50 
1981 04 99.99 -99.99  25.40 
1981 12 99.99 -99.99  25.30 
1982 06 99.99 -99.99  26.10 
1982 07 99.99 -99.99  25.80 
1982 09 99.99 -99.99  26.30 
1982 11 99.99 -99.99  25.30 
1983 01 99.99 -99.99  25.40 
1983 02 99.99 -99.99  25.90 
1983 04 99.99 -99.99  26.70 
1983 05 99.99 -99.99  25.90 
1983 10 99.99 -99.99  25.50 
1985 03 99.99 -99.99  25.60 
1987 08 99.99 -99.99  26.60 
1988 01 99.99 -99.99  25.70 
1988 08 99.99 -99.99  25.80 
1989 08 99.99 -99.99  27.40 
1990 01 99.99 -99.99  26.90 
1990 02 99.99 -99.99  27.00 
1990 06 99.99 -99.99  26.70 
1995 05 31.10  23.30  27.20 
1995 08 31.20  22.70  26.95 
1995 10 31.40  22.60  27.00 
1995 11 31.10  23.10  27.10 
1996 02 29.20  22.40  25.80 
1996 03 30.80 -99.99 -99.99 
1996 08 30.90  22.60  26.75 
1997 01 29.60  23.40  26.50 
1997 02 30.00  23.50  26.75 
1997 06 32.20  22.50  27.35 
1997 07 31.70  23.30  27.50 
1997 11 31.20  22.70  26.95 
1997 12 30.50  23.30  26.90 
1998 05 31.10  24.30  27.70 
1998 08 30.50  22.30  26.40 
1999 03 30.70  22.90  26.80 
1999 08 32.40  22.30  27.35 
1999 10 30.20  22.60  26.40 
1999 11 29.90  22.40  26.15 
2000 06 30.80  22.90  26.84 
2000 07 31.80  22.80  27.30 
2000 08 31.40  21.80  26.59 
2000 09 31.70  22.70  27.20 
2000 11 29.90  23.20  26.55 
2001 03 31.10  23.30  27.20 
2001 04 30.90  23.20  27.05 
2001 05 32.30  23.50  27.90 
2001 06 31.50  22.80  27.15 
2001 07 31.90  22.50  27.20 
2001 08 32.09  23.10  27.59 
2001 09 31.40  22.90  27.15 
2001 11 29.90  23.10  26.50 
2002 01 29.60  23.60  26.60 
2002 02 30.00  23.70  26.85 
2002 04 31.30   3.30  17.29 
2002 07 32.80  22.90  27.84 
2002 08 32.40  22.00  27.20 
2002 09 33.30  23.60  28.45 
2002 10 32.90  22.50  27.70 
2002 11 31.00  23.10  27.05 
2003 01 30.10  23.90  27.00 
2003 02 27.20  24.70  25.95 
2003 03 31.50  23.40  27.45 
2004 05 99.99 -99.99  26.60 
2006 06 99.99 -99.99  26.20 
2006 12 99.99 -99.99  26.00 
2007 01 99.99 -99.99  26.20 
2007 02 99.99 -99.99  26.00 
2007 03 99.99 -99.99  26.30 
2007 04 99.99 -99.99  26.10 
2007 05 99.99 -99.99  26.70 
2007 06 99.99 -99.99  26.40 
2007 07 99.99 -99.99  26.40 
2007 08 99.99 -99.99  26.60 
2007 09 99.99 -99.99  26.70 
2007 10 99.99 -99.99  26.00 
2007 11 99.99 -99.99  25.90 
2007 12 99.99 -99.99  25.70 
2008 01 99.99 -99.99  26.10 
2008 02 99.99 -99.99  26.30 
2008 04 99.99 -99.99  25.70 
2008 05 99.99 -99.99  26.30 
2008 06 99.99 -99.99  26.10 
2008 07 99.99 -99.99  26.40 
2008 08 99.99 -99.99  26.10 
2008 09 99.99 -99.99  26.40 
2008 10 99.99 -99.99  25.90 
2008 11 99.99 -99.99  26.00 
2008 12 99.99 -99.99  25.80 
2009 01 99.99 -99.99  26.00 
2009 02 99.99 -99.99  26.40 
2009 04 99.99 -99.99  26.40 
2009 05 99.99 -99.99  26.90 
2009 06 99.99 -99.99  27.20 
2009 07 99.99 -99.99  26.60 
2009 08 99.99 -99.99  27.40 
2009 09 99.99 -99.99  27.60 
2009 10 99.99 -99.99  26.20 
2009 11 99.99 -99.99  25.90 
2009 12 99.99 -99.99  25.80 
2010 01 99.99 -99.99  26.20 
2010 02 99.99 -99.99  26.70 
2010 03 99.99 -99.99  26.60 
2010 04 99.99 -99.99  27.00 
2010 05 99.99 -99.99  26.90 
2010 06 99.99 -99.99  26.20 
2010 07 99.99 -99.99  25.80 
2010 08 99.99 -99.99  26.00 
2010 09 99.99 -99.99  25.70 
2010 10 99.99 -99.99  25.90 
2010 11 99.99 -99.99  25.80 
2010 12 99.99 -99.99  25.80 
2011 01 99.99 -99.99  26.00 
2011 02 99.99 -99.99  26.20 
2011 03 99.99 -99.99  26.10 
2011 04 99.99 -99.99  26.10 
2011 05 99.99 -99.99  26.40 
2011 06 99.99 -99.99  26.70 
2011 07 99.99 -99.99  26.40 
2011 08 99.99 -99.99  27.30 
2011 09 99.99 -99.99  27.40 
2011 10 99.99 -99.99  25.80 
2011 11 99.99 -99.99  25.70 
2011 12 99.99 -99.99  26.00 
