Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            81        57        12.766233  13.090167  12.930445  0.080151   12.9256   
2008            81        57        11.479867  11.806867  11.654383  0.080739   11.652    
2009            81        57        12.648334  12.9065    12.771211  0.066079   12.764767 
2010            81        57        12.106267  12.4058    12.255729  0.073485   12.250733 
2011            81        57        12.4688    12.749467  12.613184  0.068288   12.610567 
2012            81        57        11.552733  11.865566  11.711754  0.078527   11.7059   
2013            81        57        12.350333  12.6272    12.491039  0.067703   12.488733 
2014            81        57        12.113867  12.4584    12.296313  0.084438   12.293167 
2015            81        57        13.730534  14.071466  13.900315  0.084773   13.895433 
2016            81        57        13.064067  13.2979    13.18428   0.056933   13.1804   
2017            81        57        13.512966  13.844334  13.684609  0.078653   13.676233 
2018            81        57        12.101867  12.4913    12.292703  0.097412   12.2861   
2019            81        57        12.547234  12.795867  12.682889  0.060314   12.684767 
2020            81        57        13.879233  14.157766  14.040918  0.064701   14.041667 
2021            81        57        13.123767  13.482767  13.295508  0.089199   13.288167 
2022            81        57        13.679173  13.930035  13.806133  0.058513   13.799069 
2023            81        57        12.8679    13.2538    13.059401  0.093166   13.052567