Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            256       223       22.983595  23.260736  23.161632  0.048356   23.170208 
2008            256       223       22.688869  22.988289  22.895239  0.053972   22.903494 
2009            256       223       22.774817  23.066032  22.980672  0.054237   22.988131 
2010            256       223       22.671499  22.936909  22.846802  0.047656   22.851305 
2011            256       223       22.94195   23.191214  23.136149  0.042136   23.146255 
2012            256       223       23.28783   23.530693  23.462168  0.04198    23.468546 
2013            256       223       22.85071   23.160036  23.056865  0.05302    23.061249 
2014            256       223       22.598738  22.935263  22.831669  0.058039   22.837202 
2015            256       223       23.445803  23.773794  23.669794  0.054569   23.676071 
2016            256       223       23.307814  23.621899  23.514911  0.055388   23.517853 
2017            256       223       23.468906  23.790512  23.687831  0.061268   23.701891 
2018            256       223       23.269217  23.644569  23.518684  0.062917   23.524551 
2019            256       223       23.288513  23.6404    23.528839  0.063536   23.541409 
2020            256       223       23.103901  23.455246  23.346937  0.062462   23.355751 
2021            256       223       22.551264  22.960566  22.823261  0.073445   22.828096 
2022            256       223       23.08794   23.622118  23.429105  0.103389   23.439072 
2023            256       223       23.20821   23.699381  23.530339  0.085335   23.537188