Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            598       598       7.829613   8.328387   8.017726   0.110614   8.008822  
2008            598       598       7.616387   8.416387   7.869102   0.187026   7.807903  
2009            598       598       8.906096   9.591548   9.129231   0.16142    9.080468  
2010            598       598       7.124548   7.763387   7.31712    0.140935   7.281032  
2011            598       598       10.264387  11.067774  10.553688  0.182194   10.517871 
2012            598       598       9.253742   10.141193  9.575333   0.188456   9.535468  
2013            598       598       7.795387   8.415258   8.03637    0.133277   8.01629   
2014            598       598       8.297258   9.34529    8.662931   0.243553   8.605016  
2015            598       598       11.127097  11.536549  11.290561  0.091168   11.287726 
2016            598       598       8.690678   9.584064   9.070221   0.199244   9.026274  
2017            598       598       9.219677   9.864903   9.495647   0.148516   9.462613  
2018            598       598       7.505097   8.27142    7.742801   0.168306   7.718323  
2019            598       598       8.297677   9.078096   8.572844   0.1812     8.534645  
2020            598       598       9.298742   9.780903   9.481599   0.100641   9.468339  
2021            598       598       9.68071    10.196322  9.852072   0.113116   9.819758  
2022            598       598       8.755936   9.368645   8.981376   0.129002   8.944129  
2023            598       598       8.442966   9.152734   8.725448   0.165126   8.726067