Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            15120     14316     9.141161   11.733581  9.944884   0.627925   9.780662  
2008            15120     14316     8.631387   11.396     9.539691   0.641853   9.402145  
2009            15120     14316     8.754161   11.685774  9.579035   0.648433   9.469484  
2010            15120     14316     9.090226   11.520258  9.722592   0.539328   9.507726  
2011            15120     14316     8.616775   10.801645  9.307903   0.505885   9.182371  
2012            15120     14316     9.038226   11.447516  9.742911   0.533084   9.667726  
2013            15120     14316     9.303484   12.438871  10.214282  0.73506    10.023564 
2014            15120     14316     10.046806  12.682064  10.970883  0.730464   10.715209 
2015            15120     14316     9.831388   14.047613  10.87724   1.021852   10.45479  
2016            15120     14316     10.320548  13.314033  11.205184  0.704142   11.006162 
2017            15120     14316     9.761323   12.358032  10.565852  0.573684   10.451178 
2018            15120     14316     9.84       13.626355  10.919199  0.84774    10.692533 
2019            15120     14316     9.915065   13.032452  10.90285   0.682706   10.787888 
2020            15120     14316     9.726516   13.086355  10.866786  0.830028   10.613064 
2021            15120     14316     9.158742   13.077258  10.312165  0.961499   9.979855  
2022            15120     14316     9.217871   11.331806  10.14609   0.548419   10.132839 
2023            15120     14316     9.818709   14.060452  11.086416  0.974738   10.940806