Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1060      930       28.3402    28.653299  28.490787  0.072352   28.480983 
2008            1060      930       29.009666  29.358366  29.203961  0.064222   29.211567 
2009            1060      930       28.459934  28.995167  28.854662  0.101061   28.873266 
2010            1060      930       29.218134  29.756134  29.561357  0.135888   29.5903   
2011            1060      930       28.743866  29.3008    29.155963  0.101088   29.180467 
2012            1060      930       29.068966  29.314167  29.2107    0.056128   29.224483 
2013            1060      930       28.689167  29.314199  29.144682  0.114957   29.163917 
2014            1060      930       27.962833  28.326334  28.233543  0.050688   28.235467 
2015            1060      930       29.026066  29.4853    29.245383  0.113323   29.24785  
2016            1060      930       28.762199  29.150867  29.014932  0.103307   29.044983 
2017            1060      930       28.419966  28.914734  28.763988  0.088642   28.786467 
2018            1060      930       28.898167  29.297567  29.140713  0.095646   29.160233 
2019            1060      930       29.221067  29.578501  29.407631  0.104618   29.411233 
2020            1060      930       28.658966  29.060633  28.88855   0.079973   28.891133 
2021            1060      930       28.977667  29.341734  29.179026  0.084037   29.169117 
2022            1060      930       29.082533  29.4142    29.239533  0.073225   29.248401 
2023            1060      930       28.945333  30.104599  29.653022  0.332489   29.7686