Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            274       177       17.074839  17.714193  17.376254  0.163348   17.356386 
2008            274       177       17.761129  18.464451  18.152156  0.191644   18.17458  
2009            274       177       14.737387  16.049871  15.382618  0.331687   15.371258 
2010            274       177       13.10813   14.117645  13.617469  0.2483     13.619162 
2011            274       177       16.495806  17.033903  16.747375  0.149213   16.735033 
2012            274       177       18.705452  19.461065  19.048962  0.211474   19.030291 
2013            274       177       15.414968  16.232258  15.818943  0.190969   15.829162 
2014            274       177       14.054452  15.39058   14.71834   0.331269   14.70171  
2015            274       177       14.595936  15.741355  15.146487  0.301588   15.124871 
2016            274       177       17.186323  17.77029   17.437521  0.150165   17.412613 
2017            274       177       17.39287   17.908936  17.633964  0.126287   17.622032 
2018            274       177       15.202774  15.692967  15.375197  0.09789    15.353452 
2019            274       177       15.784193  16.436419  15.987875  0.155893   15.933323 
2020            274       177       17.963097  18.169258  18.042117  0.047969   18.027323 
2021            274       177       16.197323  16.421194  16.319866  0.053163   16.327839 
2022            274       177       16.823387  17.207418  16.98849   0.094988   16.970839 
2023            274       177       19.366838  19.671904  19.562479  0.081672   19.577969