Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            277       214       15.700419  16.954613  16.154238  0.236738   16.150694 
2008            277       214       13.420194  14.835032  13.881716  0.24296    13.867887 
2009            277       214       12.68058   14.205581  13.183595  0.262096   13.169048 
2010            277       214       13.141839  14.539162  13.609796  0.250403   13.596436 
2011            277       214       13.681548  15.298032  14.228208  0.28861    14.214113 
2012            277       214       16.125452  17.170387  16.545541  0.213287   16.54729  
2013            277       214       11.761032  13.385065  12.285374  0.278069   12.268548 
2014            277       214       14.963225  16.240419  15.411496  0.248345   15.405016 
2015            277       214       16.798967  17.916967  17.167907  0.189957   17.171243 
2016            277       214       15.188452  16.664742  15.679846  0.266064   15.66621  
2017            277       214       14.823839  16.248936  15.342305  0.269054   15.338645 
2018            277       214       14.076838  15.181323  14.47583   0.216553   14.474806 
2019            277       214       14.930645  16.344677  15.398714  0.253793   15.385952 
2020            277       214       14.17529   15.64058   14.71296   0.282403   14.710661 
2021            277       214       18.496515  18.990162  18.641556  0.079418   18.639501 
2022            277       214       14.666419  15.840581  15.074142  0.216226   15.070774 
2023            277       214       14.5651    15.498834  14.991926  0.203232   15.010067