1976 01 99.99 -99.99  26.10 
1976 02 99.99 -99.99  25.90 
1976 03 99.99 -99.99  26.90 
1976 04 99.99 -99.99  27.30 
1976 05 99.99 -99.99  27.70 
1976 06 99.99 -99.99  26.80 
1976 07 99.99 -99.99  26.40 
1976 08 99.99 -99.99  27.60 
1976 10 99.99 -99.99  27.70 
1976 11 99.99 -99.99  27.80 
1977 01 99.99 -99.99  27.00 
1977 03 99.99 -99.99  26.80 
1977 04 99.99 -99.99  26.70 
1977 05 99.99 -99.99  27.40 
1977 06 99.99 -99.99  26.40 
1977 07 99.99 -99.99  26.70 
1977 08 99.99 -99.99  26.20 
1977 11 99.99 -99.99  28.00 
1977 12 99.99 -99.99  27.40 
1978 01 99.99 -99.99  26.60 
1978 02 99.99 -99.99  26.60 
1978 05 99.99 -99.99  27.70 
1978 06 99.99 -99.99  27.10 
1978 07 99.99 -99.99  26.50 
1978 09 99.99 -99.99  26.30 
1978 11 99.99 -99.99  26.80 
1978 12 99.99 -99.99  26.70 
1979 03 99.99 -99.99  27.20 
1979 04 99.99 -99.99  27.60 
1979 05 99.99 -99.99  27.80 
1979 06 99.99 -99.99  27.00 
1979 07 99.99 -99.99  26.70 
1979 08 99.99 -99.99  27.60 
1979 09 99.99 -99.99  26.60 
1979 10 99.99 -99.99  27.10 
1979 11 99.99 -99.99  26.60 
1979 12 99.99 -99.99  26.50 
1980 03 99.99 -99.99  26.70 
1980 05 99.99 -99.99  27.30 
1980 06 99.99 -99.99  26.50 
1980 07 99.99 -99.99  21.10 
1980 11 99.99 -99.99  27.80 
1981 02 99.99 -99.99  26.90 
1981 03 99.99 -99.99  27.60 
1981 04 99.99 -99.99  27.30 
1981 06 99.99 -99.99  27.40 
1981 09 99.99 -99.99  26.80 
1981 12 99.99 -99.99  26.50 
1982 06 99.99 -99.99  26.30 
1982 07 99.99 -99.99  26.90 
1982 08 99.99 -99.99  27.20 
1982 09 99.99 -99.99  27.50 
1982 12 99.99 -99.99  27.90 
1983 01 99.99 -99.99  27.50 
1983 02 99.99 -99.99  28.00 
1983 05 99.99 -99.99  27.50 
1983 08 99.99 -99.99  26.60 
1983 10 99.99 -99.99  27.70 
1983 11 99.99 -99.99  27.30 
1984 04 99.99 -99.99  26.70 
1985 01 99.99 -99.99  26.50 
1985 03 99.99 -99.99  26.90 
1987 10 99.99 -99.99  29.10 
1989 04 99.99 -99.99  26.70 
1989 09 99.99 -99.99  27.00 
1989 11 99.99 -99.99  26.40 
1989 12 99.99 -99.99  27.80 
1990 01 99.99 -99.99  25.70 
1990 03 99.99 -99.99  26.90 
1990 07 99.99 -99.99  27.10 
1991 01 99.99 -99.99  26.60 
1991 04 99.99 -99.99  27.60 
1991 05 99.99 -99.99  28.70 
1991 06 99.99 -99.99  27.60 
1995 05 33.00  24.10  28.55 
1995 06 32.59  23.70  28.15 
1996 01 31.80  22.70  27.25 
1996 07 31.70  29.80  30.75 
1997 02 39.00  23.00  31.00 
1997 07 32.20  23.40  27.80 
1999 03 32.40  23.50  27.95 
1999 10 32.70  23.30  28.00 
2000 07 32.50  22.90  27.70 
2000 09 35.00  23.00  29.00 
2000 12 31.90  23.10  27.50 
2001 02 31.50  22.50  27.00 
2001 03 33.59  23.20  28.40 
2001 04 34.30  23.80  29.05 
2001 09 34.20  23.50  28.85 
2002 01 33.40  22.90  28.15 
2002 05 32.50  22.60  27.55 
2002 07 34.50  22.50  28.50 
2002 09 34.90  23.60  29.25 
2003 01 33.20  23.50  28.35 
2003 12 17.70    .70   9.20 
2004 07 32.40  20.90  26.65 
2005 01 31.46  24.24  27.84 
2005 02 32.75  24.56  28.65 
2005 03 33.08  24.18  28.63 
2005 04 31.94  24.32  28.13 
2005 05 31.16  24.31  27.73 
2005 06 31.23  23.73  27.48 
2005 07 31.27  23.33  27.30 
2005 08 33.13  23.91  28.52 
2005 09 33.39  24.17  28.78 
2005 10 32.22  24.00  28.11 
2006 02 32.41  24.22  28.32 
2006 03 31.84  23.98  27.91 
2006 04 30.87  23.72  27.29 
2006 05 31.65  23.79  27.72 
2006 06 30.93  23.50  27.21 
2006 07 33.24  24.12  28.68 
2006 08 33.50  23.72  28.61 
2006 09 33.24  23.51  28.37 
2006 10 33.56  24.43  28.99 
2006 11 33.38  24.09  28.73 
2006 12 33.47  24.72  29.09 
2007 01 31.17  23.95  27.56 
2007 02 30.63  23.38  27.00 
2007 04 32.68  24.09  28.38 
2007 05 32.79  24.13  28.46 
2007 06 32.04  23.89  27.96 
2007 08 31.31  23.62  27.46 
2007 09 31.80  23.66  27.73 
2007 10 32.82  23.87  28.34 
2007 11 31.09  23.58  27.33 
2007 12 32.50  23.99  28.24 
2008 01 31.85  23.73  27.79 
2008 02 31.98  23.74  27.86 
2008 04 30.62  23.77  27.19 
2008 05 32.30  23.51  27.90 
2008 06 31.29  23.55  27.42 
2008 07 30.40  23.18  26.79 
2008 09 30.77  23.56  27.16 
2009 02 31.63  23.86  27.74 
2009 03 32.00  24.06  28.03 
2009 04 31.77  23.93  27.85 
2009 05 32.74  24.08  28.41 
2009 06 32.59  24.36  28.48 
2009 10 33.21  24.45  28.83 
2009 11 32.46  24.68  28.57 
2009 12 32.23  24.21  28.22 
2010 01 31.73  24.23  27.98 
2010 02 33.18  23.91  28.55 
2010 03 33.96  24.84  29.40 
2010 04 33.57  24.98  29.27 
2010 06 31.29  24.21  27.75 
2010 07 31.45  23.96  27.70 
2010 08 30.56  23.61  27.08 
2010 09 31.02  23.54  27.28 
2010 10 31.34  23.48  27.41 
2010 11 32.16  23.66  27.91 
2010 12 31.93  23.85  27.89 
2011 01 31.88  23.70  27.79 
2011 02 30.41  23.35  26.88 
2011 03 31.06  23.73  27.39 
2011 04 32.16  23.82  27.99 
2011 05 32.50  24.55  28.53 
2011 06 32.34  24.57  28.45 
2011 07 31.92  23.57  27.74 
2011 08 33.18  24.29  28.74 
2011 09 31.59  23.65  27.62 
2011 10 32.91  24.05  28.48 
2011 11 32.55  24.22  28.38 
2012 01 30.81  23.84  27.32 
2012 02 32.23  23.77  28.00 
2012 03 32.33  23.91  28.12 
2012 04 32.30  24.14  28.22 
2012 05 32.96  24.15  28.55 
2012 06 33.02  24.31  28.66 
2012 07 30.04  23.66  26.85 
2012 09 32.65  23.26  27.95 
2012 10 33.97  24.56  29.26 
2012 12 32.06  24.27  28.16 
2013 01 31.58  24.28  27.93 
2013 02 32.37  24.41  28.39 
2013 03 33.37  24.98  29.17 
2013 04 32.84  24.90  28.87 
2013 05 32.62  24.68  28.65 
2013 06 32.73  24.25  28.49 
2013 07 30.78  23.78  27.28 
2013 08 31.60  23.49  27.54 
2013 10 32.45  24.17  28.31 
2013 11 32.43  24.54  28.49 
2013 12 31.97  24.53  28.25 
