Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1060      930       28.072613  28.537483  28.335531  0.111664   28.357016 
2008            1060      930       29.350742  29.773838  29.57252   0.077508   29.566887 
2009            1060      930       28.474613  29.232515  28.975022  0.105303   28.974307 
2010            1060      930       29.820484  30.081387  29.937523  0.060336   29.933887 
2011            1060      930       30.139162  30.649807  30.515958  0.116613   30.565855 
2012            1060      930       29.54929   29.799677  29.650006  0.058507   29.645081 
2013            1060      930       29.010452  29.523226  29.381706  0.097533   29.401371 
2014            1060      930       29.394741  30.037161  29.87149   0.087645   29.895194 
2015            1060      930       28.59042   28.974064  28.869729  0.06856    28.874759 
2016            1060      930       29.632162  30.143999  29.982054  0.098586   29.997307 
2017            1060      930       30.386452  30.65629   30.566534  0.055205   30.573887 
2018            1060      930       29.021904  29.542742  29.39448   0.103338   29.40471  
2019            1060      930       29.41358   29.792612  29.655491  0.093167   29.67858  
2020            1060      930       29.116936  30.221388  29.929142  0.201142   30.020678 
2021            1060      930       29.531775  30.25      29.97385   0.154567   30.000226 
2022            1060      930       30.002193  30.393     30.240782  0.086481   30.249209 
2023            1060      930       29.123001  31.022581  30.424384  0.363126   30.515017