Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            817       479       14.182467  14.5981    14.484652  0.071598   14.493234 
2008            817       479       12.346766  13.1881    12.705845  0.179839   12.674334 
2009            817       479       14.929466  15.376933  15.236622  0.099839   15.2493   
2010            817       479       13.2857    13.883034  13.609212  0.141676   13.606867 
2011            817       479       12.996233  14.180567  13.616361  0.289211   13.587367 
2012            817       479       14.309767  14.853133  14.649117  0.101979   14.659667 
2013            817       479       15.251734  16.313967  15.846432  0.229071   15.856533 
2014            817       479       14.2271    15.260034  14.828215  0.263546   14.8239   
2015            817       479       13.7171    14.875134  14.38212   0.290765   14.361567 
2016            817       479       13.348033  14.7028    14.107281  0.300958   14.097667 
2017            817       479       12.616567  14.422234  13.61676   0.410805   13.604667 
2018            817       479       13.6323    14.7644    14.331675  0.256904   14.334766 
2019            817       479       15.099033  16.123734  15.760132  0.236393   15.783367 
2020            817       479       16.411867  18.389833  17.50823   0.542733   17.5973   
2021            817       479       15.3453    17.295267  16.547849  0.540255   16.708866 
2022            817       479       13.286533  14.486433  13.917522  0.260663   13.900066 
2023            817       479       16.960899  18.665867  18.057141  0.499549   18.253201