Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            396       361       14.960255  15.551882  15.313026  0.134444   15.332529 
2008            396       361       14.464399  15.036896  14.763448  0.134301   14.769148 
2009            396       361       14.33672   14.941298  14.646245  0.141765   14.650438 
2010            396       361       14.394572  15.037526  14.759606  0.143985   14.777343 
2011            396       361       14.658022  15.367863  15.052807  0.152328   15.06852  
2012            396       361       15.749886  16.199736  16.00181   0.106591   16.009838 
2013            396       361       14.163236  14.84066   14.544161  0.154171   14.559214 
2014            396       361       14.100674  14.734211  14.479139  0.147109   14.496178 
2015            396       361       14.410326  14.981682  14.732544  0.130383   14.746698 
2016            396       361       15.268049  15.787766  15.568619  0.116308   15.586473 
2017            396       361       15.022839  15.581416  15.276025  0.125673   15.26857  
2018            396       361       14.72788   15.273209  14.980486  0.119866   14.977685 
2019            396       361       15.082687  15.726658  15.395945  0.144427   15.395962 
2020            396       361       15.508779  16.124121  15.832369  0.146142   15.841924 
2021            396       361       14.988774  15.549725  15.204883  0.125816   15.192132 
2022            396       361       14.605185  15.149107  14.8487    0.13151    14.845209 
2023            396       361       15.299694  15.747557  15.489131  0.098838   15.484757