Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            289       144       28.401711  28.58658   28.498561  0.050467   28.502919 
2008            289       144       28.609516  28.714743  28.650504  0.027799   28.641145 
2009            289       144       28.207258  28.322613  28.267243  0.028243   28.275693 
2010            289       144       28.858257  28.974291  28.909332  0.028107   28.902855 
2011            289       144       28.976549  29.248871  29.084642  0.064861   29.067855 
2012            289       144       29.388258  29.543324  29.453864  0.036504   29.449677 
2013            289       144       28.460064  28.618935  28.544305  0.038803   28.546597 
2014            289       144       29.000549  29.125612  29.040754  0.02828    29.035146 
2015            289       144       28.669613  28.789614  28.739451  0.031271   28.742759 
2016            289       144       29.863483  30.132225  30.050929  0.046556   30.063532 
2017            289       144       29.351549  29.533613  29.457077  0.038057   29.460613 
2018            289       144       29.417904  29.601387  29.510166  0.042697   29.512387 
2019            289       144       29.898645  30.111032  29.990067  0.051127   29.981451 
2020            289       144       29.456387  29.750872  29.666502  0.08244    29.700339 
2021            289       144       28.344257  28.650614  28.536062  0.073453   28.553855 
2022            289       144       29.278484  29.531645  29.387969  0.05734    29.376419 
2023            289       144       29.448484  29.761871  29.668452  0.074427   29.68321