Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1073      658       6.156667   7.182367   6.771697   0.186684   6.77125   
2008            1073      658       8.6264     9.145833   8.948592   0.11267    8.930833  
2009            1073      658       7.5367     8.267767   8.020748   0.183005   8.052933  
2010            1073      658       8.783134   9.9859     9.439921   0.333942   9.457217  
2011            1073      658       7.504827   8.114758   7.906071   0.163065   7.946655  
2012            1073      658       10.391233  11.204166  10.940879  0.191745   10.96815  
2013            1073      658       8.1099     9.029634   8.690307   0.194417   8.712384  
2014            1073      658       6.418567   7.237967   6.992515   0.217569   7.0606    
2015            1073      658       6.090067   7.0307     6.833024   0.181566   6.886733  
2016            1073      658       8.821867   9.545234   9.256872   0.163129   9.26085   
2017            1073      658       8.213      8.966733   8.689091   0.156655   8.726317  
2018            1073      658       6.5384     7.367933   7.087259   0.186968   7.1024    
2019            1073      658       8.083134   8.7635     8.58481    0.1274     8.6061    
2020            1073      658       8.6597     9.611167   9.233219   0.248479   9.274366  
2021            1073      658       8.697433   10.1452    9.488465   0.359784   9.505667  
2022            1073      658       7.8617     8.4038     8.237292   0.136469   8.269     
2023            1073      658       9.573793   10.720069  10.179893  0.28917    10.186656