Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            126       60        18.235966  18.871967  18.630896  0.134127   18.638933 
2008            126       60        16.104166  16.916967  16.575471  0.208759   16.600984 
2009            126       60        18.719999  19.317533  19.089506  0.135661   19.10885  
2010            126       60        19.110399  19.565001  19.408698  0.09273    19.422501 
2011            126       60        17.8004    18.581734  18.293706  0.161733   18.313149 
2012            126       60        16.0163    16.9415    16.595328  0.189844   16.616683 
2013            126       60        17.691099  18.5193    18.214616  0.167485   18.234366 
2014            126       60        17.118467  17.879833  17.575304  0.168166   17.581717 
2015            126       60        20.0179    20.6141    20.419125  0.119348   20.45325  
2016            126       60        18.321833  19.080601  18.792042  0.148317   18.822117 
2017            126       60        17.663     18.444567  18.145139  0.156134   18.170751 
2018            126       60        18.291599  19.119734  18.80417   0.167308   18.828466 
2019            126       60        18.1026    18.868233  18.590328  0.153142   18.609983 
2020            126       60        20.288134  20.867399  20.692166  0.117339   20.72845  
2021            126       60        16.255766  17.140368  16.830223  0.171909   16.865366 
2022            126       60        18.095793  18.873379  18.593587  0.158994   18.63     
2023            126       60        17.541233  18.350067  18.072977  0.160114   18.103316