Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            469       445       29.993065  30.313614  30.18155   0.077731   30.188612 
2008            469       445       28.323839  29.107775  28.899262  0.194429   28.982452 
2009            469       445       29.333515  29.777935  29.641115  0.105612   29.668194 
2010            469       445       29.900839  30.565161  30.427898  0.149199   30.490225 
2011            469       445       29.682386  30.369162  30.236321  0.143559   30.290806 
2012            469       445       29.284515  29.803032  29.641306  0.12214    29.668676 
2013            469       445       28.550903  28.964418  28.871671  0.063104   28.881935 
2014            469       445       28.164452  28.741419  28.548108  0.095806   28.555742 
2015            469       445       28.871483  29.297838  29.18995   0.063451   29.194967 
2016            469       445       29.446806  29.803904  29.676258  0.084534   29.689259 
2017            469       445       28.918871  29.307741  29.219408  0.066147   29.22929  
2018            469       445       28.218613  28.685968  28.486272  0.091352   28.481613 
2019            469       445       29.093807  29.613258  29.471321  0.078181   29.481291 
2020            469       445       29.75071   30.386032  30.238939  0.130211   30.285225 
2021            469       445       30.442064  30.866871  30.767325  0.091803   30.806484 
2022            469       445       29.763548  29.972225  29.910871  0.036494   29.914549 
2023            469       445       29.511387  30.583     30.297201  0.283272   30.412678