Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            559       485       10.282935  12.457484  11.23434   0.589772   11.133806 
2008            559       485       8.034451   9.658097   8.829318   0.42188    8.807549  
2009            559       485       7.139065   9.491936   8.197889   0.600747   8.107806  
2010            559       485       4.814322   7.381355   5.745752   0.680267   5.566774  
2011            559       485       3.964516   6.151548   4.726988   0.567878   4.569807  
2012            559       485       9.512677   11.38171   10.30389   0.462055   10.25071  
2013            559       485       8.043033   9.38329    8.675769   0.356681   8.681129  
2014            559       485       7.385581   9.576161   8.383348   0.549308   8.361581  
2015            559       485       6.361322   7.80029    7.042864   0.35115    7.01729   
2016            559       485       8.965451   10.065516  9.598628   0.265932   9.641709  
2017            559       485       6.596065   9.398742   7.666095   0.700998   7.471839  
2018            559       485       2.853      6.25       4.30453    0.832972   4.125936  
2019            559       485       7.563516   8.446838   8.005258   0.241191   8.007065  
2020            559       485       8.854645   10.015806  9.384117   0.310174   9.324645  
2021            559       485       7.49       8.378581   7.924988   0.215112   7.932419  
2022            559       485       7.133      7.899645   7.518632   0.176694   7.528645  
2023            559       485       8.258323   9.282323   8.781397   0.258603   8.789645