Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            817       479       10.1448    10.3317    10.231286  0.054662   10.230333 
2008            817       479       8.615067   8.721733   8.645551   0.026955   8.634367  
2009            817       479       8.9886     9.342333   9.214499   0.085034   9.2417    
2010            817       479       10.1516    10.216534  10.18129   0.01102    10.182067 
2011            817       479       9.150311   9.263449   9.184606   0.02894    9.173793  
2012            817       479       9.785233   10.035967  9.862876   0.055796   9.853066  
2013            817       479       10.116966  10.264433  10.220057  0.039745   10.233733 
2014            817       479       10.692     10.7941    10.743021  0.030621   10.742833 
2015            817       479       11.3244    11.523733  11.462639  0.035917   11.4702   
2016            817       479       11.963667  12.083333  12.000821  0.029463   11.9917   
2017            817       479       10.199966  10.357333  10.292907  0.030797   10.298667 
2018            817       479       9.746266   9.8324     9.780145   0.017785   9.782633  
2019            817       479       10.731     10.773933  10.754975  0.009167   10.755234 
2020            817       479       10.354433  10.678967  10.555644  0.075672   10.578533 
2021            817       479       10.220567  10.684134  10.550126  0.113718   10.596867 
2022            817       479       9.366266   9.524734   9.428734   0.042975   9.420567  
2023            817       479       9.114345   9.377034   9.327971   0.040873   9.337517