Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            2271      1991      8.115733   9.100667   8.897424   0.167989   8.939134  
2008            2271      1991      8.806967   10.255033  9.780494   0.320046   9.857467  
2009            2271      1991      9.425533   10.149767  9.930325   0.149205   9.969566  
2010            2271      1991      10.372133  12.425867  11.235696  0.504844   11.1462   
2011            2271      1991      9.225793   9.905655   9.62254    0.14047    9.639828  
2012            2271      1991      12.028367  12.8282    12.524827  0.171594   12.522933 
2013            2271      1991      9.358633   11.1884    10.068652  0.440183   9.972934  
2014            2271      1991      8.047367   9.5238     8.683963   0.38204    8.640367  
2015            2271      1991      8.077467   9.383966   8.770024   0.329953   8.772933  
2016            2271      1991      10.5969    11.866734  11.140989  0.326068   11.067567 
2017            2271      1991      10.4856    11.914933  11.209312  0.346829   11.204866 
2018            2271      1991      7.7931     8.666833   8.446533   0.137134   8.471233  
2019            2271      1991      9.152933   10.308333  9.892395   0.202032   9.886367  
2020            2271      1991      10.166866  11.316566  10.730606  0.28887    10.677134 
2021            2271      1991      10.4361    12.728033  11.362159  0.539249   11.2293   
2022            2271      1991      9.014767   10.018766  9.649764   0.167994   9.649867  
2023            2271      1991      12.018931  13.940862  13.017659  0.4631     13.025552