Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            94        75        21.085337  21.485643  21.364427  0.071088   21.36377  
2008            94        75        20.031883  20.526073  20.392133  0.091248   20.417379 
2009            94        75        20.045132  20.627399  20.471509  0.113668   20.504187 
2010            94        75        20.049067  20.472515  20.352618  0.075093   20.370077 
2011            94        75        20.671087  21.134045  21.008187  0.082632   21.028587 
2012            94        75        21.309191  21.734762  21.601492  0.075748   21.602283 
2013            94        75        20.464994  21.001223  20.835009  0.093701   20.838024 
2014            94        75        19.936335  20.488287  20.318494  0.096829   20.323416 
2015            94        75        20.705313  21.218515  21.062781  0.090777   21.063139 
2016            94        75        21.380655  21.86788   21.693841  0.091827   21.68088  
2017            94        75        21.575052  22.000561  21.854085  0.07803    21.850071 
2018            94        75        20.7384    21.25312   21.085054  0.091158   21.088408 
2019            94        75        21.460482  21.899403  21.748628  0.081395   21.742201 
2020            94        75        21.504864  21.950153  21.782311  0.091327   21.769749 
2021            94        75        20.972572  21.273981  21.166861  0.05841    21.163881 
2022            94        75        21.320381  21.756931  21.611132  0.081678   21.598873 
2023            94        75        21.211988  21.608414  21.439237  0.093272   21.41675