Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            81        35        15.500968  15.972936  15.776334  0.119292   15.785258 
2008            81        35        15.281775  15.607484  15.478336  0.081485   15.488677 
2009            81        35        13.763162  14.271097  14.052056  0.129781   14.049742 
2010            81        35        12.009709  12.622645  12.360301  0.154227   12.372    
2011            81        35        14.936935  15.325968  15.162229  0.097229   15.164548 
2012            81        35        16.539064  16.925709  16.773661  0.097167   16.784128 
2013            81        35        11.736645  12.513419  12.168707  0.196239   12.177742 
2014            81        35        13.689096  14.810194  14.324219  0.281391   14.342838 
2015            81        35        14.331516  15.145549  14.794405  0.208498   14.791323 
2016            81        35        15.143161  15.593032  15.407721  0.113462   15.413936 
2017            81        35        15.093419  15.628355  15.404256  0.133982   15.413548 
2018            81        35        13.867226  14.43242   14.199089  0.13968    14.204064 
2019            81        35        15.229871  15.519194  15.389865  0.073412   15.39358  
2020            81        35        15.741677  16.172741  16.004272  0.112224   16.008549 
2021            81        35        13.747     14.125258  13.98794   0.092831   14.012613 
2022            81        35        15.532097  16.101582  15.867261  0.141362   15.874774 
2023            81        35        16.893742  17.084904  17.026888  0.048502   17.043291