Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            178       62        21.221546  21.319731  21.268662  0.022469   21.265209 
2008            178       62        20.67532   20.793142  20.730926  0.028338   20.728868 
2009            178       62        20.686775  20.895264  20.823788  0.043023   20.830874 
2010            178       62        20.419992  20.527975  20.468989  0.025665   20.466045 
2011            178       62        21.037857  21.175196  21.111735  0.027262   21.108689 
2012            178       62        21.369478  21.502371  21.44288   0.028905   21.439787 
2013            178       62        20.493036  20.68749   20.598304  0.040182   20.593793 
2014            178       62        20.359915  20.511509  20.427237  0.036682   20.42345  
2015            178       62        20.876339  20.994438  20.932628  0.029581   20.930458 
2016            178       62        21.165958  21.395294  21.313015  0.045474   21.314859 
2017            178       62        21.399929  21.591192  21.519858  0.038426   21.519879 
2018            178       62        20.9958    21.106825  21.052222  0.0266     21.051495 
2019            178       62        21.420923  21.601538  21.528251  0.03656    21.528442 
2020            178       62        21.300924  21.470705  21.403753  0.034719   21.404173 
2021            178       62        20.760262  20.888193  20.841865  0.026212   20.8441   
2022            178       62        21.056107  21.301357  21.210476  0.04925    21.214326 
2023            178       62        20.857534  21.041986  20.950382  0.046379   20.943031