Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            435       393       8.556678   8.635839   8.587465   0.018596   8.585871  
2008            435       393       8.751      9.005355   8.851847   0.058772   8.840355  
2009            435       393       8.410968   8.635936   8.50568    0.047626   8.499484  
2010            435       393       9.26071    9.690904   9.473587   0.113663   9.476291  
2011            435       393       8.641161   8.909516   8.770957   0.054722   8.769258  
2012            435       393       10.087     10.373871  10.239487  0.063956   10.240516 
2013            435       393       7.731032   8.075032   7.858307   0.075234   7.839516  
2014            435       393       11.936258  12.38858   12.191876  0.127476   12.210613 
2015            435       393       9.89442    10.256678  10.095735  0.080411   10.103839 
2016            435       393       9.485032   9.76171    9.611401   0.056523   9.597194  
2017            435       393       9.241871   9.608548   9.436341   0.077785   9.442613  
2018            435       393       9.307677   9.76071    9.547524   0.121587   9.545484  
2019            435       393       8.664968   8.908903   8.801195   0.051994   8.806452  
2020            435       393       9.219226   9.453129   9.303017   0.051695   9.296613  
2021            435       393       9.055225   9.367226   9.196629   0.06343    9.197162  
2022            435       393       8.390742   8.743451   8.577899   0.088223   8.581355  
2023            435       393       9.493533   10.016733  9.734472   0.105176   9.731433