Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            435       435       7.816903   8.157226   7.952719   0.063062   7.945742  
2008            435       435       7.847387   8.342032   8.039938   0.116275   8.018097  
2009            435       435       8.929903   9.324549   9.098652   0.087472   9.084387  
2010            435       435       7.455935   8.015032   7.631119   0.134227   7.587613  
2011            435       435       10.363935  10.757161  10.528233  0.073579   10.522388 
2012            435       435       9.010612   9.807      9.268128   0.217581   9.186709  
2013            435       435       7.848097   8.352      8.04121    0.131992   8.017258  
2014            435       435       7.830709   8.922161   8.256032   0.262583   8.245968  
2015            435       435       11.008225  11.558484  11.163675  0.108549   11.144936 
2016            435       435       8.773613   9.976742   9.094334   0.311703   8.943774  
2017            435       435       9.325516   9.986129   9.56369    0.169352   9.505451  
2018            435       435       7.091322   8.018903   7.408964   0.219292   7.331677  
2019            435       435       8.249645   8.852936   8.509751   0.15219    8.488709  
2020            435       435       9.412387   9.795194   9.56371    0.082042   9.559387  
2021            435       435       10.025903  10.596291  10.259611  0.141444   10.214484 
2022            435       435       8.591904   9.204194   8.918373   0.158054   8.902613  
2023            435       435       8.897767   9.312      9.110374   0.075684   9.1119