Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            563       558       13.719129  14.00329   13.829238  0.079842   13.805274 
2008            563       558       14.276871  14.76929   14.538483  0.12089    14.537065 
2009            563       558       13.946936  14.443935  14.189872  0.14005    14.171854 
2010            563       558       13.900806  14.049226  13.964689  0.041595   13.958371 
2011            563       558       13.734064  14.091355  13.895765  0.101542   13.895274 
2012            563       558       13.500451  14.117323  13.773155  0.182039   13.740048 
2013            563       558       14.352323  14.65429   14.496031  0.07992    14.488403 
2014            563       558       15.494452  15.724807  15.587178  0.07404    15.564516 
2015            563       558       16.140516  16.428226  16.249665  0.066087   16.237323 
2016            563       558       13.019871  13.454387  13.19383   0.108538   13.178726 
2017            563       558       13.157387  13.603354  13.335282  0.112133   13.320742 
2018            563       558       14.858097  15.272258  15.053027  0.111833   15.042581 
2019            563       558       13.647161  14.185452  13.872123  0.134501   13.857951 
2020            563       558       14.953806  16.076645  15.479227  0.277736   15.477435 
2021            563       558       14.632097  15.820839  15.190244  0.303187   15.192468 
2022            563       558       14.465871  15.304774  14.844452  0.223506   14.813774 
2023            563       558       14.269387  16.033161  15.086679  0.447984   15.073919