1977 10 30.96  26.50  28.73 
1982 05 30.47  27.62  29.04 
1982 06 30.66  28.19  29.42 
1982 07 30.19  27.93  29.06 
1982 08 30.72  28.01  29.36 
1982 11 28.11  25.94  27.02 
1982 12 25.08  22.86  23.97 
1983 11 26.24  24.42  25.33 
1983 12 25.16  23.35  24.25 
1984 01 23.77  21.55  22.66 
1984 02 24.98  22.19  23.58 
1984 03 27.78  24.32  26.05 
1984 04 30.20  27.02  28.61 
1984 06 30.15  28.00  29.07 
1989 04 29.65  26.65  28.15 
1989 05 30.74  27.39  29.06 
1989 06 30.14  27.39  28.76 
1989 07 30.10  27.19  28.64 
1989 08 29.98  27.09  28.53 
1989 09 30.39  27.02  28.70 
1989 12 25.81  22.83  24.32 
1990 01 26.16  22.92  24.54 
1990 08 31.22  28.22  29.72 
1990 10 28.18  25.80  26.99 
1990 11 27.30  24.88  26.09 
1991 04 29.98  26.84  28.41 
1991 07 29.93  27.67  28.80 
1992 01 24.90  21.64  23.27 
1992 02 26.72  23.31  25.01 
1992 03 28.96  25.23  27.09 
1994 02 27.50  23.89  25.69 
1994 03 28.37  24.64  26.50 
1994 04 30.85  26.90  28.87 
1994 05 30.73  28.07  29.40 
1994 06 30.17  27.80  28.98 
1994 09 29.71  26.54  28.12 
1998 02 32.06  26.50  29.28 
1999 02 33.21  25.55  29.38 
1999 07 29.68  26.33  28.00 
2000 02 29.48  25.49  27.48 
2000 11 29.23  25.95  27.59 
2001 01 29.53  25.62  27.57 
2001 11 29.79  25.93  27.86 
2001 12 29.98  25.44  27.71 
2002 01 31.37  25.56  28.46 
2002 02 31.71  25.64  28.67 
2002 03 33.93  25.72  29.82 
2002 04 35.22  26.67  30.94 
2002 08 29.91  25.15  27.53 
2002 10 30.99  25.08  28.03 
2002 11 31.17  25.84  28.50 
2002 12 31.84  26.78  29.31 
2003 01 30.88  25.20  28.04 
2003 02 33.02  25.80  29.41 
2003 03 34.50  26.47  30.48 
2003 04 36.23  26.89  31.56 
2003 06 32.55  26.71  29.63 
2003 07 31.77  26.22  28.99 
2003 10 31.94  26.00  28.97 
2003 11 31.82  26.65  29.23 
2003 12 30.50  26.21  28.35 
2004 01 31.51  26.13  28.82 
2004 02 31.74  25.59  28.66 
2005 03 35.75  26.29  31.02 
2005 12 28.22  25.04  26.63 
2006 02 31.57  26.21  28.89 
2006 08 30.03  27.20  28.61 
2007 01 27.89  25.03  26.46 
2007 03 32.89  26.58  29.73 
2007 06 33.11  27.16  30.13 
2007 10 30.98  26.33  28.65 
2008 01 29.86  25.68  27.77 
2008 02 29.24  24.77  27.00 
2008 06 33.04  26.92  29.98 
2008 08 31.36  26.21  28.78 
2008 10 32.53  26.49  29.50 
2009 03 33.77  26.83  30.30 
2009 04 32.65  27.57  30.11 
2009 05 32.18  26.77  29.47 
2009 08 31.80  27.35  29.57 
2009 10 31.46  26.57  29.01 
2010 04 34.18  28.06  31.12 
2011 10 31.28  26.95  29.11 
2012 10 31.16  26.83  28.99 
2013 01 29.17  25.98  27.57 
2013 05 32.93  28.18  30.55 
2013 07 30.72  26.56  28.64 
2013 09 30.08  26.67  28.37 
2013 10 30.54  26.88  28.71 
2013 11 30.00  26.85  28.42 
