Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            733       712       28.355368  28.710567  28.487426  0.081979   28.460267 
2008            733       712       29.2805    29.688833  29.463654  0.116866   29.4458   
2009            733       712       28.867001  29.286434  29.064886  0.093914   29.05545  
2010            733       712       30.154367  30.355833  30.263482  0.048919   30.271084 
2011            733       712       29.631399  29.996468  29.767103  0.068296   29.75385  
2012            733       712       28.4014    28.606533  28.501846  0.058125   28.51     
2013            733       712       29.308634  29.556566  29.44396   0.064118   29.441283 
2014            733       712       28.429867  28.746334  28.593905  0.079458   28.609133 
2015            733       712       29.432568  29.641134  29.522596  0.04118    29.5223   
2016            733       712       29.108566  29.3505    29.21848   0.069626   29.203116 
2017            733       712       27.454634  27.680166  27.562567  0.048354   27.5504   
2018            733       712       29.860666  30.1756    30.018126  0.092192   30.016083 
2019            733       712       28.987566  29.248001  29.080846  0.060807   29.065133 
2020            733       712       28.402733  28.726633  28.574258  0.087193   28.588433 
2021            733       712       28.091499  28.357866  28.209274  0.068947   28.199517 
2022            733       712       30.417601  30.7593    30.604467  0.084616   30.591884 
2023            733       712       28.996933  29.370766  29.178241  0.114943   29.163