Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            469       445       28.330872  28.662323  28.563735  0.062153   28.575773 
2008            469       445       28.369839  28.696484  28.576135  0.077306   28.585096 
2009            469       445       28.061129  28.726257  28.568018  0.158945   28.635677 
2010            469       445       29.702709  29.921129  29.844972  0.050012   29.840935 
2011            469       445       29.441999  30.067129  29.938209  0.13618    29.994259 
2012            469       445       29.161226  29.475903  29.389222  0.067859   29.405548 
2013            469       445       28.412161  28.783161  28.667335  0.084893   28.683096 
2014            469       445       28.057613  28.62113   28.479474  0.082152   28.487806 
2015            469       445       27.214096  27.535872  27.401599  0.048673   27.402388 
2016            469       445       28.047516  28.667936  28.422116  0.109866   28.424419 
2017            469       445       29.524515  29.898968  29.784018  0.084251   29.806322 
2018            469       445       27.732161  28.069065  27.962767  0.058022   27.967516 
2019            469       445       29.017387  29.389194  29.289108  0.085154   29.314484 
2020            469       445       29.042936  30.035999  29.708703  0.176372   29.763128 
2021            469       445       29.311516  29.967871  29.751389  0.160947   29.814096 
2022            469       445       29.149645  29.776903  29.617472  0.158866   29.685871 
2023            469       445       28.907322  30.097677  29.749016  0.336743   29.895483