Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            598       598       6.992806   7.817677   7.287285   0.192623   7.240887  
2008            598       598       5.263226   5.871613   5.500322   0.131565   5.463952  
2009            598       598       4.020129   5.278613   4.43026    0.301964   4.329823  
2010            598       598       4.29629    5.118613   4.599769   0.17752    4.566323  
2011            598       598       3.092226   4.27271    3.520065   0.284996   3.442597  
2012            598       598       6.893194   8.144613   7.358523   0.296836   7.287129  
2013            598       598       5.616      6.484032   5.940245   0.199272   5.8845    
2014            598       598       4.25       5.383742   4.619297   0.270536   4.538919  
2015            598       598       4.183936   5.732323   4.785351   0.335485   4.691097  
2016            598       598       7.167548   7.880032   7.39888    0.144718   7.372065  
2017            598       598       6.139387   7.084355   6.464441   0.225853   6.410677  
2018            598       598       3.112677   4.335032   3.579561   0.268108   3.511597  
2019            598       598       4.840194   5.797581   5.17861    0.20613    5.128871  
2020            598       598       5.863097   6.87129    6.22525    0.217563   6.21079   
2021            598       598       5.831484   6.792613   6.180135   0.203464   6.129016  
2022            598       598       5.976419   6.974097   6.326091   0.235305   6.26629   
2023            598       598       5.88071    6.924677   6.206253   0.233867   6.162452