1976 01 99.99 -99.99  24.70 
1976 02 99.99 -99.99  25.90 
1976 03 99.99 -99.99  26.30 
1976 04 99.99 -99.99  27.10 
1976 05 99.99 -99.99  27.10 
1976 06 99.99 -99.99  26.40 
1976 07 99.99 -99.99  26.40 
1976 08 99.99 -99.99  27.10 
1976 09 99.99 -99.99  26.70 
1976 10 99.99 -99.99  26.30 
1976 11 99.99 -99.99  26.00 
1976 12 99.99 -99.99  26.00 
1977 03 99.99 -99.99  27.60 
1977 04 99.99 -99.99  28.00 
1977 05 99.99 -99.99  28.70 
1977 06 99.99 -99.99  28.20 
1977 07 99.99 -99.99  27.40 
1977 08 99.99 -99.99  28.40 
1977 09 99.99 -99.99  27.30 
1977 10 99.99 -99.99  26.20 
1977 11 99.99 -99.99  26.10 
1977 12 99.99 -99.99  26.30 
1978 01 99.99 -99.99  26.50 
1978 02 99.99 -99.99  27.60 
1978 03 99.99 -99.99  28.00 
1978 04 99.99 -99.99  28.10 
1978 05 99.99 -99.99  27.80 
1978 06 99.99 -99.99  27.90 
1978 07 99.99 -99.99  26.30 
1978 09 99.99 -99.99  23.90 
1978 10 99.99 -99.99  26.60 
1978 11 99.99 -99.99  26.10 
1978 12 99.99 -99.99  25.80 
1979 01 99.99 -99.99  26.40 
1979 02 99.99 -99.99  26.60 
1979 03 99.99 -99.99  27.70 
1979 04 99.99 -99.99  27.50 
1979 05 99.99 -99.99  27.70 
1979 06 99.99 -99.99  27.50 
1979 07 99.99 -99.99  26.40 
1979 08 99.99 -99.99  27.10 
1979 09 99.99 -99.99  26.30 
1979 10 99.99 -99.99  26.70 
1979 12 99.99 -99.99  26.20 
1980 01 99.99 -99.99  26.40 
1980 02 99.99 -99.99  26.90 
1980 03 99.99 -99.99  27.00 
1980 04 99.99 -99.99  27.90 
1980 05 99.99 -99.99  28.00 
1980 06 99.99 -99.99  27.40 
1980 07 99.99 -99.99  26.80 
1980 08 99.99 -99.99  26.30 
1980 09 99.99 -99.99  27.20 
1980 10 99.99 -99.99  26.30 
1980 11 99.99 -99.99  25.80 
1980 12 99.99 -99.99  25.30 
1981 01 99.99 -99.99  25.50 
1981 03 99.99 -99.99  26.90 
1981 04 99.99 -99.99  26.80 
1981 06 99.99 -99.99  27.50 
1981 09 99.99 -99.99  26.20 
1984 04 99.99  24.10 -99.99 
1984 05 30.50  24.80  27.65 
1984 06 30.00 -99.99 -99.99 
1984 07 29.50 -99.99 -99.99 
1984 08 99.99  25.00 -99.99 
1984 11 99.99  23.70 -99.99 
1985 03 99.99  23.50 -99.99 
1985 05 99.99  24.00 -99.99 
1985 08 30.50  24.00  27.25 
1985 09 99.99  23.70 -99.99 
1985 10 99.99  22.90 -99.99 
1985 11 99.99  22.90 -99.99 
1985 12 99.99  23.10 -99.99 
1986 01 28.70  23.10  25.90 
1986 02 29.20  22.80  26.00 
1986 03 29.40  23.10  26.25 
1986 04 31.20  23.70  27.45 
1986 06 30.50  23.60  27.05 
1986 07 30.50  23.80  27.15 
1986 08 29.70  23.80  26.75 
1986 09 28.50  22.50  25.50 
1986 10 29.10  23.00  26.05 
1986 11 29.10  22.90  26.00 
1986 12 28.30  23.00  25.65 
1987 01 28.80 -99.99 -99.99 
1987 02 30.10 -99.99 -99.99 
1987 03 30.50  23.50  27.00 
1987 04 30.90  23.70  27.30 
1987 05 30.90  23.90  27.40 
1987 06 99.99  24.20 -99.99 
1987 07 99.99  24.20 -99.99 
1987 08 30.30  23.30  26.80 
1987 09 99.99  23.40 -99.99 
1987 10 29.80  23.60  26.70 
1987 11 30.10 -99.99 -99.99 
1987 12 28.60  23.30  25.95 
1988 03 30.80  23.80  27.30 
1988 04 31.00  24.10  27.55 
1988 05 30.90 -99.99 -99.99 
1988 06 31.30 -99.99 -99.99 
1988 07 30.90  23.10  27.00 
1988 08 30.90  22.90  26.90 
1988 10 30.00  23.30  26.65 
1988 11 28.50  22.70  25.60 
1988 12 28.10  22.30  25.20 
1989 03 99.99  22.50 -99.99 
1989 06 30.60 -99.99 -99.99 
1990 12 28.10 -99.99 -99.99 
1991 02 30.20  23.20  26.70 
1991 09 30.80  23.00  26.90 
1991 10 99.99  22.60 -99.99 
1992 03 99.99  22.80 -99.99 
1992 06 31.00 -99.99 -99.99 
1992 11 28.50 -99.99 -99.99 
1992 12 28.20 -99.99 -99.99 
1993 02 29.10 -99.99 -99.99 
1993 09 30.00 -99.99 -99.99 
1993 11 99.99  22.30 -99.99 
1993 12 28.60  22.30  25.45 
1994 01 29.10  22.30  25.70 
1994 02 29.70  22.50  26.10 
1994 04 30.50  23.00  26.75 
1994 05 30.40  22.80  26.59 
1994 06 31.50  22.90  27.20 
1994 07 31.60  22.40  27.00 
1994 08 30.40  22.50  26.45 
1994 09 31.00  22.80  26.90 
1994 10 29.40  22.50  25.95 
1994 11 28.30  22.10  25.20 
1994 12 29.20  22.20  25.70 
1995 01 28.80  23.10  25.95 
1995 02 29.20  22.60  25.90 
1995 03 30.30  23.10  26.70 
1995 04 31.50  23.80  27.65 
1995 05 31.10  23.50  27.30 
1995 06 31.10  23.40  27.25 
1995 07 31.50  22.70  27.10 
1995 08 29.80  22.50  26.15 
1995 09 29.80  22.40  26.09 
1995 10 29.80  22.70  26.25 
1995 11 29.90  22.60  26.25 
1995 12 28.10  20.60  24.35 
1996 01 28.70  20.90  24.80 
1996 02 28.70  20.90  24.80 
1996 03 30.60  21.80  26.20 
1996 04 31.10  21.70  26.40 
1996 05 30.70  21.80  26.25 
1996 06 30.60  21.50  26.05 
1996 07 29.90  21.50  25.70 
1996 08 29.90  21.40  25.65 
1996 09 30.00  21.20  25.60 
1996 11 29.10  20.80  24.95 
1996 12 28.30  20.10  24.20 
1997 01 29.20  21.00  25.10 
1997 02 29.00  20.29  24.65 
2000 03 30.40  20.80  25.59 
2003 09 99.99 -99.99  26.70 
2003 10 99.99 -99.99  26.10 
2003 11 99.99 -99.99  26.30 
2004 02 99.99 -99.99  26.50 
2004 04 99.99 -99.99 -27.50 
2004 05 99.99 -99.99  27.70 
2004 06 99.99 -99.99 -27.50 
2004 07 99.99 -99.99  26.90 
2004 08 99.99 -99.99  27.60 
2004 09 99.99 -99.99  26.50 
2004 10 99.99 -99.99  26.70 
2004 11 99.99 -99.99  26.30 
2004 12 99.99 -99.99  26.10 
2005 02 99.99 -99.99  26.70 
2005 04 99.99 -99.99  28.00 
2005 06 99.99 -99.99  27.40 
2005 07 99.99 -99.99  27.60 
2005 09 99.99 -99.99  27.00 
2005 10 99.99 -99.99  26.00 
2005 11 99.99 -99.99  26.00 
2005 12 99.99 -99.99  25.50 
2006 01 99.99 -99.99  15.80 
2006 02 99.99 -99.99  26.40 
2006 03 99.99 -99.99  26.70 
2006 05 99.99 -99.99  27.20 
2006 06 99.99 -99.99  27.30 
2006 07 99.99 -99.99  27.60 
2006 08 99.99 -99.99 -27.70 
2006 09 99.99 -99.99  26.30 
2006 11 99.99 -99.99  26.00 
2006 12 99.99 -99.99  25.90 
2007 01 99.99 -99.99  26.20 
2007 02 99.99 -99.99  26.70 
2007 04 99.99 -99.99  27.20 
2007 05 99.99 -99.99  27.70 
2007 06 99.99 -99.99  27.50 
2007 07 99.99 -99.99  27.30 
2007 08 99.99 -99.99  27.30 
2007 09 99.99 -99.99  27.20 
2007 10 99.99 -99.99  26.10 
2007 11 99.99 -99.99  25.80 
2007 12 99.99 -99.99  25.60 
2008 01 99.99 -99.99  26.30 
2008 04 99.99 -99.99  26.70 
2008 07 99.99 -99.99  26.80 
2008 08 99.99 -99.99  26.80 
2008 09 99.99 -99.99  26.90 
2008 11 99.99 -99.99  26.00 
2008 12 99.99 -99.99  25.70 
2009 01 99.99 -99.99  25.40 
2009 03 99.99 -99.99  26.50 
2009 05 99.99 -99.99  27.50 
2009 07 99.99 -99.99  27.80 
2009 08 99.99 -99.99  26.80 
2009 10 99.99 -99.99  26.90 
2009 11 99.99 -99.99  26.00 
2009 12 99.99 -99.99  27.40 
2010 01 99.99 -99.99  26.40 
2010 03 99.99 -99.99  27.40 
2010 04 99.99 -99.99  28.30 
2010 05 99.99 -99.99  28.70 
2010 06 99.99 -99.99  27.40 
2010 07 99.99 -99.99  27.10 
2010 08 99.99 -99.99  27.60 
2010 10 99.99 -99.99  27.60 
2010 11 99.99 -99.99  25.90 
2010 12 99.99 -99.99  26.00 
2011 03 99.99 -99.99  26.60 
2011 07 99.99 -99.99  27.80 
2011 08 99.99 -99.99  27.70 
2011 09 99.99 -99.99  26.90 
2011 10 99.99 -99.99  26.40 
