Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1213      941       11.273129  11.941129  11.687173  0.202488   11.725064 
2008            1213      941       11.177065  11.882838  11.607941  0.155002   11.613129 
2009            1213      941       11.471387  12.166033  11.848324  0.215388   11.818322 
2010            1213      941       12.450193  12.961162  12.737133  0.164689   12.732581 
2011            1213      941       11.388484  11.807516  11.562464  0.091247   11.547677 
2012            1213      941       10.339193  10.844193  10.69107   0.132628   10.749678 
2013            1213      941       10.377548  11.213419  10.906276  0.257193   11.001064 
2014            1213      941       13.160419  13.700613  13.510884  0.13378    13.546323 
2015            1213      941       13.545936  14.111774  13.929493  0.163982   14.00171  
2016            1213      941       13.23142   13.865387  13.631464  0.183235   13.679677 
2017            1213      941       12.516645  12.860709  12.697954  0.103725   12.713968 
2018            1213      941       11.69058   12.249871  12.009661  0.17492    11.965516 
2019            1213      941       12.53929   13.09029   12.778189  0.177417   12.697064 
2020            1213      941       12.360354  13.18629   12.879446  0.187143   12.892903 
2021            1213      941       11.011517  13.457032  11.967629  0.302152   12.02429  
2022            1213      941       11.14558   11.849258  11.60969   0.192262   11.681452 
2023            1213      941       10.511968  11.321613  10.859937  0.271523   10.742774