2007/01 MEAN = 28.19 STDEV = 0.02 Data Points = 16
2007/02 MEAN = 28.18 STDEV = 0.03 Data Points = 5
2007/03 MEAN = 28.19 STDEV = 0.01 Data Points = 6
2007/04 MEAN = 28.21 STDEV = 0.01 Data Points = 2
2007/05 MEAN = NA STDEV = NA Data Points = 0
2007/06 MEAN = 28.21 STDEV = 0.01 Data Points = 2
2007/07 MEAN = 28.21 STDEV = 0.01 Data Points = 4
2007/08 MEAN = 28.16 STDEV = 0.0 Data Points = 2
2007/09 MEAN = 28.17 STDEV = 0.06 Data Points = 10
2007/10 MEAN = 28.13 STDEV = 0.08 Data Points = 6
2007/11 MEAN = 28.13 STDEV = 0.0 Data Points = 2
2007/12 MEAN = 28.075 STDEV = NA Data Points = 1
2008/01 MEAN = 28.15 STDEV = 0.02 Data Points = 10
2008/02 MEAN = 28.11 STDEV = 0.02 Data Points = 8
2008/03 MEAN = 28.11 STDEV = 0.05 Data Points = 14
2008/04 MEAN = 28.21 STDEV = 0.03 Data Points = 4
2008/05 MEAN = 27.9633333333 STDEV = NA Data Points = 1
2008/06 MEAN = NA STDEV = NA Data Points = 0
2008/07 MEAN = NA STDEV = NA Data Points = 0
2008/08 MEAN = 28.19 STDEV = 0.04 Data Points = 8
2008/09 MEAN = 28.19 STDEV = 0.02 Data Points = 4
2008/10 MEAN = 28.12 STDEV = 0.04 Data Points = 2
2008/11 MEAN = 28.11 STDEV = 0.15 Data Points = 5
2008/12 MEAN = 28.22 STDEV = 0.02 Data Points = 3
2009/01 MEAN = NA STDEV = NA Data Points = 0
2009/02 MEAN = NA STDEV = NA Data Points = 0
2009/03 MEAN = NA STDEV = NA Data Points = 0
2009/04 MEAN = NA STDEV = NA Data Points = 0
2009/05 MEAN = 28.22 STDEV = 0.0 Data Points = 2
2009/06 MEAN = 28.18 STDEV = 0.01 Data Points = 2
2009/07 MEAN = 28.26 STDEV = 0.01 Data Points = 2
2009/08 MEAN = 28.23 STDEV = 0.06 Data Points = 8
2009/09 MEAN = 28.12 STDEV = 0.1 Data Points = 6
2009/10 MEAN = 28.07 STDEV = 0.0 Data Points = 2
2009/11 MEAN = 28.2 STDEV = 0.01 Data Points = 6
2009/12 MEAN = 28.18 STDEV = 0.03 Data Points = 6
2010/01 MEAN = 28.18 STDEV = 0.05 Data Points = 10
2010/02 MEAN = 28.21 STDEV = 0.03 Data Points = 6
2010/03 MEAN = 28.13 STDEV = 0.13 Data Points = 6
2010/04 MEAN = 28.06 STDEV = 0.07 Data Points = 5
2010/05 MEAN = 28.27 STDEV = 0.01 Data Points = 2
2010/06 MEAN = 28.242 STDEV = NA Data Points = 1
2010/07 MEAN = 28.17 STDEV = 0.0 Data Points = 2
2010/08 MEAN = NA STDEV = NA Data Points = 0
2010/09 MEAN = NA STDEV = NA Data Points = 0
2010/10 MEAN = 28.1 STDEV = 0.04 Data Points = 2
2010/11 MEAN = 28.11 STDEV = 0.02 Data Points = 2
2010/12 MEAN = NA STDEV = NA Data Points = 0
2011/01 MEAN = 28.15 STDEV = 0.07 Data Points = 5
2011/02 MEAN = 28.17 STDEV = 0.02 Data Points = 6
2011/03 MEAN = 28.13 STDEV = 0.05 Data Points = 11
2011/04 MEAN = 28.09 STDEV = 0.02 Data Points = 4
2011/05 MEAN = 28.22 STDEV = 0.01 Data Points = 4
2011/06 MEAN = 28.13 STDEV = 0.02 Data Points = 2
2011/07 MEAN = 28.14 STDEV = 0.04 Data Points = 8
2011/08 MEAN = 28.18 STDEV = 0.01 Data Points = 6
2011/09 MEAN = NA STDEV = NA Data Points = 0
2011/10 MEAN = NA STDEV = NA Data Points = 0
2011/11 MEAN = NA STDEV = NA Data Points = 0
2011/12 MEAN = 28.35 STDEV = 0.05 Data Points = 12
2012/01 MEAN = 28.36 STDEV = 0.12 Data Points = 6
2012/02 MEAN = 28.43 STDEV = 0.02 Data Points = 8
2012/03 MEAN = 28.43 STDEV = 0.01 Data Points = 3