Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            81        35        18.005484  18.473839  18.245912  0.123691   18.238483 
2008            81        35        15.079162  15.732032  15.424889  0.170578   15.412193 
2009            81        35        16.445097  17.187225  16.83472   0.194536   16.821161 
2010            81        35        13.787097  14.518032  14.187666  0.187581   14.181452 
2011            81        35        16.371902  16.956354  16.673327  0.154046   16.662645 
2012            81        35        16.346968  17.207031  16.819864  0.221277   16.809677 
2013            81        35        16.169678  17.028355  16.649121  0.218527   16.647871 
2014            81        35        15.745291  16.609774  16.191586  0.227499   16.176001 
2015            81        35        17.587612  18.263161  17.935208  0.177381   17.919033 
2016            81        35        13.774742  15.007871  14.486102  0.308012   14.510355 
2017            81        35        14.384097  15.433517  14.950705  0.271763   14.929483 
2018            81        35        14.096484  14.943161  14.545039  0.220255   14.526742 
2019            81        35        15.431193  16.236645  15.866247  0.209118   15.848774 
2020            81        35        13.338097  14.208258  13.804227  0.223042   13.798903 
2021            81        35        13.821033  14.853742  14.427665  0.256267   14.446161 
2022            81        35        13.019903  14.177645  13.672535  0.292194   13.68929  
2023            81        35        13.0211    13.983033  13.550259  0.247701   13.533067