Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            96        90        21.46887   21.71913   21.615363  0.071464   21.636904 
2008            96        90        18.90658   19.161451  19.080686  0.061384   19.090145 
2009            96        90        20.054871  20.492775  20.207682  0.095081   20.193162 
2010            96        90        17.177258  17.573097  17.273753  0.084744   17.249452 
2011            96        90        19.686291  19.984646  19.796884  0.057674   19.794161 
2012            96        90        19.973194  20.195     20.032204  0.045625   20.02329  
2013            96        90        20.639452  21.022581  20.789216  0.082108   20.784323 
2014            96        90        18.892902  19.064806  18.996219  0.043014   19.0095   
2015            96        90        22.134064  22.422323  22.222365  0.051513   22.217597 
2016            96        90        20.887484  21.047483  20.959201  0.033251   20.961516 
2017            96        90        20.927547  21.178904  21.012068  0.047876   21.007968 
2018            96        90        18.876484  19.309839  19.006077  0.084797   18.991887 
2019            96        90        20.156807  20.637161  20.296164  0.101717   20.274    
2020            96        90        18.737226  19.298872  18.873498  0.12254    18.841129 
2021            96        90        20.871     21.091871  20.948346  0.037835   20.950371 
2022            96        90        20.887291  21.357807  21.027563  0.10497    21.00821  
2023            96        90        18.837534  19.1679    18.960324  0.066692   18.95865