Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            435       435       3.502516   4.175677   3.725345   0.141601   3.687581  
2008            435       435       5.054839   5.778839   5.537759   0.156391   5.58271   
2009            435       435       3.870097   4.526581   4.150467   0.143598   4.124322  
2010            435       435       4.377484   4.912323   4.768564   0.107495   4.785161  
2011            435       435       3.956581   4.740871   4.453902   0.195351   4.495129  
2012            435       435       7.277613   8.136742   7.653398   0.23531    7.607419  
2013            435       435       4.411549   4.824032   4.618471   0.080204   4.620903  
2014            435       435       2.341355   2.974742   2.600614   0.125204   2.58371   
2015            435       435       1.615548   3.102968   2.15809    0.350054   2.12129   
2016            435       435       5.864548   6.480678   6.152926   0.167084   6.099645  
2017            435       435       4.266935   5.376774   4.56824    0.256206   4.476935  
2018            435       435       4.061162   4.752807   4.383239   0.179172   4.352452  
2019            435       435       3.939677   4.599516   4.213914   0.164663   4.173193  
2020            435       435       6.461064   7.106226   6.709181   0.150479   6.690806  
2021            435       435       4.443581   5.593548   4.825514   0.291375   4.722484  
2022            435       435       4.978258   5.556193   5.22752    0.136021   5.204032  
2023            435       435       5.563129   6.10071    5.833598   0.13174    5.845839