Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            300       271       19.295967  19.908838  19.699435  0.161317   19.731226 
2008            300       271       17.192871  17.351225  17.276042  0.036367   17.276806 
2009            300       271       16.688452  16.925194  16.845921  0.04282    16.848871 
2010            300       271       17.609516  17.882742  17.772443  0.053163   17.771387 
2011            300       271       17.418581  17.672194  17.582407  0.063376   17.585484 
2012            300       271       17.834806  18.079775  17.984432  0.054234   17.983    
2013            300       271       17.732     18.052     17.986549  0.051116   17.996033 
2014            300       271       18.137774  18.431677  18.344777  0.052271   18.347033 
2015            300       271       17.184645  17.431517  17.324699  0.053845   17.323257 
2016            300       271       18.466162  18.59029   18.543618  0.031475   18.552097 
2017            300       271       19.054129  19.640549  19.399692  0.169069   19.395483 
2018            300       271       19.519871  19.779259  19.718914  0.043352   19.731323 
2019            300       271       18.175838  18.419193  18.30296   0.052436   18.292774 
2020            300       271       17.765936  18.531742  18.187605  0.165379   18.156193 
2021            300       271       19.122419  19.483839  19.320362  0.080966   19.309774 
2022            300       271       16.884838  17.04571   16.958323  0.039112   16.958677 
2023            300       271       17.498741  17.783129  17.662571  0.058936   17.663097