Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            256       223       20.579067  21.2619    20.991766  0.11735    20.998034 
2008            256       223       20.096767  20.757566  20.50008   0.131713   20.508101 
2009            256       223       20.926367  21.546366  21.307645  0.110356   21.303699 
2010            256       223       20.809032  21.411133  21.153398  0.112465   21.1525   
2011            256       223       19.571466  20.408199  20.077669  0.145038   20.0716   
2012            256       223       19.639767  20.537834  20.189826  0.160348   20.184067 
2013            256       223       20.608     21.302866  21.042164  0.126964   21.038668 
2014            256       223       19.8395    20.515633  20.279498  0.121765   20.2915   
2015            256       223       22.458433  23.140566  22.885941  0.121192   22.902    
2016            256       223       21.808666  22.528233  22.210751  0.158379   22.219467 
2017            256       223       21.270666  22.1024    21.76344   0.183655   21.7876   
2018            256       223       21.204599  22.076134  21.755785  0.158338   21.756767 
2019            256       223       20.404066  21.326633  21.018699  0.173819   21.051167 
2020            256       223       21.767267  22.5658    22.226946  0.160112   22.215567 
2021            256       223       19.777466  20.985533  20.544068  0.222868   20.551733 
2022            256       223       20.856415  21.570379  21.305894  0.134146   21.324139 
2023            256       223       19.9513    21.187933  20.694071  0.230915   20.6819