Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            86        13        20.97558   21.103323  21.040509  0.039544   21.041193 
2008            86        13        20.78458   20.854807  20.818201  0.020373   20.824387 
2009            86        13        20.794291  20.891323  20.841003  0.028609   20.845259 
2010            86        13        21.038612  21.088419  21.061653  0.014012   21.062872 
2011            86        13        21.479322  21.526161  21.50629   0.014914   21.510548 
2012            86        13        22.34042   22.352097  22.345224  0.003215   22.345516 
2013            86        13        19.386581  19.521999  19.45668   0.039765   19.469742 
2014            86        13        20.838354  20.91316   20.87736   0.022163   20.884516 
2015            86        13        21.778709  21.853968  21.815581  0.023444   21.814259 
2016            86        13        20.748903  20.841419  20.791074  0.029091   20.786097 
2017            86        13        22.363291  22.381968  22.368796  0.006055   22.366354 
2018            86        13        21.229033  21.305323  21.264928  0.022899   21.266356 
2019            86        13        22.723419  22.793676  22.755898  0.020709   22.76042  
2020            86        13        21.03442   21.13229   21.081065  0.028958   21.081484 
2021            86        13        21.14171   21.160484  21.15229   0.004763   21.153065 
2022            86        13        21.768194  21.798903  21.783075  0.009067   21.784452 
2023            86        13        20.585936  20.657259  20.621164  0.022063   20.619806