Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            526       485       28.205566  28.514067  28.349431  0.071252   28.3351   
2008            526       485       28.965334  29.200333  29.058938  0.055438   29.046534 
2009            526       485       28.554333  28.853001  28.764379  0.054786   28.772266 
2010            526       485       29.296801  29.542101  29.429902  0.051773   29.4203   
2011            526       485       28.681833  29.151567  29.023794  0.095777   29.051733 
2012            526       485       28.977301  29.221167  29.09684   0.045415   29.089466 
2013            526       485       28.5725    29.043266  28.888554  0.09684    28.920233 
2014            526       485       27.8853    28.161467  28.015803  0.066106   28.008667 
2015            526       485       29.042133  29.209499  29.134164  0.03463    29.135    
2016            526       485       28.799299  29.064966  28.911977  0.053227   28.901966 
2017            526       485       28.744066  28.919666  28.812544  0.038049   28.806467 
2018            526       485       28.424467  29.038334  28.821549  0.159942   28.860466 
2019            526       485       29.363434  29.615334  29.533975  0.055546   29.547367 
2020            526       485       28.657633  28.830767  28.734432  0.030709   28.7306   
2021            526       485       29.044933  29.319401  29.187848  0.049703   29.181101 
2022            526       485       28.806801  29.173067  29.003048  0.089624   28.987167 
2023            526       485       29.222166  29.9121    29.584481  0.172015   29.558968