Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            563       558       11.119064  11.72358   11.426079  0.158013   11.444145 
2008            563       558       11.284613  11.711516  11.535789  0.106553   11.527016 
2009            563       558       11.892064  12.333033  12.114042  0.1156     12.109484 
2010            563       558       12.808517  13.18971   12.986054  0.101838   12.981645 
2011            563       558       12.083807  12.452387  12.26276   0.084888   12.267661 
2012            563       558       11.989     12.245355  12.130201  0.068159   12.141306 
2013            563       558       11.875645  12.345581  12.14822   0.136599   12.177693 
2014            563       558       12.878194  13.311903  13.115163  0.111245   13.121581 
2015            563       558       13.92742   14.483483  14.218892  0.129541   14.2085   
2016            563       558       13.201806  13.676968  13.470438  0.123495   13.483048 
2017            563       558       11.773774  12.529936  12.187816  0.211019   12.203177 
2018            563       558       13.118322  13.551935  13.398358  0.118002   13.419613 
2019            563       558       13.038742  13.498549  13.298921  0.127058   13.325952 
2020            563       558       12.463967  12.939742  12.705916  0.120832   12.722645 
2021            563       558       11.709129  11.966839  11.846405  0.064419   11.851419 
2022            563       558       12.326258  13.008419  12.681873  0.164367   12.694161 
2023            563       558       12.070839  12.554935  12.334567  0.134155   12.34529