Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            733       712       29.093483  29.351999  29.215792  0.051507   29.209258 
2008            733       712       29.74371   30.207678  30.031425  0.121734   30.063645 
2009            733       712       29.467096  29.694775  29.596982  0.035986   29.601436 
2010            733       712       29.76458   29.974678  29.874735  0.057426   29.875274 
2011            733       712       29.962065  30.226936  30.084812  0.059646   30.082047 
2012            733       712       29.768     29.944     29.865229  0.047131   29.866742 
2013            733       712       29.119484  29.354258  29.221217  0.071396   29.1935   
2014            733       712       29.157677  29.522129  29.316578  0.102942   29.311823 
2015            733       712       30.051613  30.225098  30.122788  0.04222    30.113226 
2016            733       712       30.44429   30.716354  30.607006  0.069758   30.619064 
2017            733       712       29.720226  30.16758   29.962159  0.11666    29.978291 
2018            733       712       29.973516  30.286516  30.138317  0.081569   30.14737  
2019            733       712       29.221483  29.563644  29.405999  0.088969   29.417839 
2020            733       712       29.525936  29.772903  29.692166  0.055059   29.70658  
2021            733       712       29.248419  29.59458   29.436348  0.079655   29.424629 
2022            733       712       30.279581  30.563904  30.392949  0.079069   30.385952 
2023            733       712       30.953291  31.288     31.112299  0.087917   31.118387