Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            310       302       29.229645  30.014517  29.67437   0.234248   29.688452 
2008            310       302       28.034452  28.691517  28.364716  0.16033    28.386032 
2009            310       302       28.389872  29.458162  28.896537  0.269666   28.878484 
2010            310       302       29.324516  30.363386  29.853987  0.26578    29.854516 
2011            310       302       28.933483  30.086065  29.451823  0.311822   29.408258 
2012            310       302       28.352226  29.407904  28.87625   0.286364   28.875064 
2013            310       302       28.065033  28.723387  28.316668  0.172589   28.269194 
2014            310       302       27.552097  28.383484  27.836198  0.242436   27.717516 
2015            310       302       28.213354  29.151711  28.623126  0.281555   28.537193 
2016            310       302       28.217064  29.542967  28.896632  0.414225   28.876226 
2017            310       302       28.057646  29.048645  28.529285  0.289053   28.474597 
2018            310       302       28.025614  28.449064  28.204156  0.095261   28.194742 
2019            310       302       28.598387  29.316257  28.920314  0.178863   28.893048 
2020            310       302       29.370935  30.144548  29.823451  0.195967   29.871516 
2021            310       302       29.936935  30.655193  30.394492  0.172508   30.437371 
2022            310       302       29.011032  29.856903  29.44435   0.232971   29.432791 
2023            310       302       29.337872  30.115162  29.748604  0.181213   29.77029