Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            94        75        18.706501  19.034267  18.932644  0.058023   18.929567 
2008            94        75        19.006901  19.265434  19.166334  0.05289    19.154966 
2009            94        75        18.318434  18.746099  18.622905  0.076329   18.6392   
2010            94        75        18.875     19.126667  19.049923  0.042964   19.053833 
2011            94        75        21.14938   21.402241  21.308642  0.059503   21.304241 
2012            94        75        21.574266  21.755733  21.673128  0.04398    21.668467 
2013            94        75        18.0968    18.5513    18.398779  0.08878    18.3913   
2014            94        75        18.094566  18.458267  18.349382  0.071454   18.342966 
2015            94        75        19.7087    20.1185    19.998781  0.076627   19.992434 
2016            94        75        19.605     20.013233  19.811376  0.114989   19.787233 
2017            94        75        21.401066  21.581501  21.537264  0.02932    21.540567 
2018            94        75        18.0784    18.586367  18.388417  0.109487   18.3701   
2019            94        75        19.096367  19.527666  19.383809  0.083394   19.3727   
2020            94        75        20.486967  20.848234  20.668984  0.103941   20.6551   
2021            94        75        19.084467  19.3395    19.240645  0.067858   19.2418   
2022            94        75        20.399967  20.655033  20.530627  0.060869   20.516733 
2023            94        75        20.449862  20.944483  20.715648  0.138333   20.706621