Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1073      658       6.458903   7.724936   6.944899   0.327743   6.848548  
2008            1073      658       4.917484   6.218129   5.310428   0.315107   5.212097  
2009            1073      658       3.539452   4.848387   4.06198    0.324487   3.966403  
2010            1073      658       3.902161   4.999226   4.341212   0.265748   4.272339  
2011            1073      658       1.740065   3.082      2.308224   0.332193   2.218855  
2012            1073      658       6.662323   7.962968   7.203968   0.333146   7.113065  
2013            1073      658       5.549097   6.737064   6.006812   0.291871   5.920436  
2014            1073      658       3.658903   4.951226   4.14438    0.318163   4.058419  
2015            1073      658       4.195742   5.515935   4.665135   0.307455   4.567484  
2016            1073      658       6.73429    7.823903   7.189939   0.255249   7.122855  
2017            1073      658       5.595452   6.500419   5.941799   0.183366   5.915516  
2018            1073      658       3.296548   4.705968   3.960479   0.280529   3.919113  
2019            1073      658       4.599903   5.693581   5.067152   0.234272   5.009419  
2020            1073      658       5.564806   7.011484   6.138387   0.309844   6.071532  
2021            1073      658       5.024065   6.31129    5.565062   0.285997   5.499161  
2022            1073      658       5.205774   6.726581   5.806446   0.34753    5.728823  
2023            1073      658       5.016484   6.268      5.526445   0.286542   5.473161