Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            5431      5188      12.653709  18.054871  15.592372  1.106136   15.626694 
2008            5431      5188      9.836484   15.295065  12.590779  1.173016   12.608532 
2009            5431      5188      9.627291   15.633839  13.004566  1.230165   13.084064 
2010            5431      5188      6.805742   15.939581  12.451075  1.787036   12.530306 
2011            5431      5188      4.307645   14.455516  10.551911  1.938106   10.599806 
2012            5431      5188      10.732355  19.200968  15.71175   1.655793   15.748871 
2013            5431      5188      9.037129   17.032709  13.316476  1.58814    13.342823 
2014            5431      5188      9.835968   18.151936  14.557865  1.67113    14.63242  
2015            5431      5188      7.776968   17.798065  13.274205  2.040579   13.318484 
2016            5431      5188      8.968097   17.957226  13.34877   1.721864   13.189904 
2017            5431      5188      8.115807   18.697193  13.982675  2.013201   13.936935 
2018            5431      5188      4.988581   17.413612  12.180527  2.439001   12.231709 
2019            5431      5188      8.097194   13.316194  10.55568   1.090918   10.5475   
2020            5431      5188      9.016903   17.285257  13.141744  1.553515   12.958242 
2021            5431      5188      6.765807   14.064645  10.670895  1.544212   10.629177 
2022            5431      5188      7.548677   15.88529   11.775503  1.766018   11.684613 
2023            5431      5188      7.720323   16.279936  12.535904  1.741043   12.373145