Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            309       273       8.968518   9.420082   9.228153   0.096647   9.228874  
2008            309       273       8.918636   9.338399   9.182905   0.09304    9.185667  
2009            309       273       8.748852   9.260458   9.068422   0.105304   9.068337  
2010            309       273       9.511633   9.952332   9.788631   0.095655   9.795852  
2011            309       273       9.434412   9.988044   9.772716   0.121346   9.770354  
2012            309       273       10.360713  10.99235   10.755087  0.135128   10.758144 
2013            309       273       9.691655   10.222715  10.037113  0.117355   10.045781 
2014            309       273       8.910791   9.520233   9.273929   0.139029   9.274698  
2015            309       273       8.989441   9.548641   9.356745   0.118895   9.366142  
2016            309       273       9.779491   10.385639  10.163332  0.130729   10.168959 
2017            309       273       9.252482   9.932786   9.68642    0.146078   9.694548  
2018            309       273       9.173326   9.960904   9.668895   0.172057   9.672932  
2019            309       273       8.865781   9.437049   9.232158   0.11147    9.239348  
2020            309       273       9.607872   10.128     9.931878   0.110162   9.935513  
2021            309       273       10.250846  10.822027  10.596295  0.126073   10.59565  
2022            309       273       9.872393   10.522307  10.304469  0.13585    10.314291 
2023            309       273       10.311168  10.726399  10.568025  0.084863   10.570885