Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            134       88        12.717226  12.910065  12.776068  0.038635   12.779371 
2008            134       88        12.498775  12.793033  12.578357  0.054778   12.570097 
2009            134       88        13.048258  13.292613  13.176808  0.06462    13.171694 
2010            134       88        13.492064  13.67242   13.576088  0.043286   13.574452 
2011            134       88        12.587322  12.718355  12.658143  0.033796   12.660565 
2012            134       88        14.967871  15.258129  15.130212  0.076238   15.132516 
2013            134       88        12.848806  13.088097  12.992721  0.058954   13.008984 
2014            134       88        13.161419  13.572871  13.377542  0.110949   13.379807 
2015            134       88        12.398678  12.889194  12.670139  0.131239   12.672371 
2016            134       88        13.445     13.735     13.615075  0.077822   13.619678 
2017            134       88        12.192904  12.563935  12.419647  0.103633   12.431484 
2018            134       88        13.833871  14.142871  14.006941  0.076132   14.005806 
2019            134       88        12.779516  13.072162  12.960348  0.073787   12.96629  
2020            134       88        13.419871  13.578516  13.513536  0.03783    13.519871 
2021            134       88        13.778258  13.921     13.865793  0.038507   13.874032 
2022            134       88        14.016355  14.488871  14.268746  0.124322   14.266226 
2023            134       88        13.397871  13.614323  13.501316  0.052835   13.50308