Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            563       558       14.878767  15.459333  15.204882  0.146509   15.2285   
2008            563       558       15.696466  16.26      15.929253  0.142423   15.932    
2009            563       558       14.1701    14.8032    14.452181  0.175277   14.429866 
2010            563       558       14.088834  14.583034  14.322987  0.12634    14.307533 
2011            563       558       14.8107    15.1776    14.946409  0.094821   14.912583 
2012            563       558       14.438033  14.7009    14.579023  0.067736   14.5923   
2013            563       558       14.255533  14.910267  14.59486   0.170653   14.567667 
2014            563       558       17.181166  17.509567  17.340252  0.106834   17.352133 
2015            563       558       16.758034  17.0448    16.931304  0.069624   16.929667 
2016            563       558       14.5646    14.742766  14.656526  0.052394   14.65785  
2017            563       558       16.535433  16.7244    16.641572  0.040552   16.633433 
2018            563       558       14.234134  14.433434  14.320662  0.057955   14.306016 
2019            563       558       15.368466  15.803667  15.564028  0.114221   15.55995  
2020            563       558       15.7361    16.744432  16.137822  0.252145   16.095349 
2021            563       558       16.218967  17.334167  16.697122  0.299976   16.680683 
2022            563       558       15.979567  16.660099  16.228072  0.176579   16.1862   
2023            563       558       16.429867  17.123234  16.679326  0.177934   16.647901