Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            733       712       13.873387  15.118194  14.484439  0.270704   14.456839 
2008            733       712       13.251935  14.899742  14.058683  0.360176   14.033339 
2009            733       712       14.397258  15.635967  14.991027  0.267559   14.970371 
2010            733       712       13.545613  14.625646  14.046837  0.234522   14.017823 
2011            733       712       12.667581  13.812613  13.198327  0.246507   13.16779  
2012            733       712       15.470806  16.313999  15.875661  0.187858   15.864516 
2013            733       712       15.783387  16.762871  16.230202  0.214127   16.202387 
2014            733       712       11.854451  13.09529   12.41505   0.269025   12.381887 
2015            733       712       13.871194  14.976484  14.359665  0.240812   14.323081 
2016            733       712       12.246419  13.037807  12.563385  0.178175   12.54458  
2017            733       712       15.115678  16.003323  15.482655  0.219196   15.465193 
2018            733       712       11.457516  12.728129  12.008964  0.271015   11.968387 
2019            733       712       13.963775  14.696161  14.274626  0.178841   14.248274 
2020            733       712       14.316677  15.036581  14.657763  0.16163    14.640613 
2021            733       712       12.342194  13.109226  12.668883  0.172154   12.645919 
2022            733       712       12.834904  13.520806  13.122241  0.153325   13.119726 
2023            733       712       13.998612  14.849903  14.385933  0.190646   14.364032