Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1380      1279      15.261354  17.788517  16.440737  0.671698   16.491678 
2008            1380      1279      12.774936  16.46542   14.207462  0.908036   14.158161 
2009            1380      1279      12.088387  15.917     13.566134  0.933976   13.494258 
2010            1380      1279      12.544032  16.268871  13.925048  0.929369   13.823065 
2011            1380      1279      12.624162  16.114645  14.145799  0.887941   14.145032 
2012            1380      1279      16.020483  18.331936  17.124204  0.599013   17.189646 
2013            1380      1279      11.568322  16.300871  13.294626  1.092015   13.113968 
2014            1380      1279      15.073613  16.988903  15.985411  0.515275   16.009483 
2015            1380      1279      16.996098  18.695484  17.74768   0.402553   17.698967 
2016            1380      1279      14.820903  18.231871  16.155827  0.841289   16.122355 
2017            1380      1279      14.311807  17.418259  15.605585  0.794114   15.585613 
2018            1380      1279      13.852903  16.451355  15.113843  0.684091   15.156064 
2019            1380      1279      14.277162  17.016129  15.50647   0.714632   15.516581 
2020            1380      1279      13.800258  16.748129  15.103827  0.75409    15.115129 
2021            1380      1279      18.62513   19.416225  18.861346  0.215953   18.778967 
2022            1380      1279      13.900354  16.550064  15.12425   0.655227   15.137774 
2023            1380      1279      14.959367  16.375467  15.757825  0.333983   15.7541