Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            710       666       4.085      4.580367   4.377519   0.107346   4.378683  
2008            710       666       5.925933   6.315133   6.154602   0.058175   6.156233  
2009            710       666       5.2624     5.557933   5.39373    0.07552    5.381183  
2010            710       666       6.856633   7.139167   7.019467   0.054575   7.0187    
2011            710       666       5.023207   5.460241   5.30287    0.100791   5.344345  
2012            710       666       6.629533   6.926567   6.82119    0.059488   6.8177    
2013            710       666       6.0674     6.318533   6.231336   0.047769   6.236567  
2014            710       666       3.9978     4.691833   4.387755   0.157418   4.384683  
2015            710       666       4.018867   4.4709     4.304249   0.085248   4.3212    
2016            710       666       5.495333   5.719633   5.617331   0.050763   5.609933  
2017            710       666       5.547933   5.914067   5.792943   0.08051    5.806783  
2018            710       666       4.934733   5.134467   5.049115   0.051155   5.052767  
2019            710       666       4.533834   4.902933   4.784739   0.074264   4.793133  
2020            710       666       5.433367   5.903033   5.720772   0.1106     5.734367  
2021            710       666       6.298467   6.752934   6.524202   0.101779   6.48795   
2022            710       666       5.5816     5.794367   5.749331   0.037173   5.7615    
2023            710       666       6.220448   6.387311   6.292855   0.031417   6.297173