Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1819      1715      4.588516   6.221323   5.435117   0.272532   5.446613  
2008            1819      1715      2.827613   4.101484   3.507317   0.248285   3.507936  
2009            1819      1715      3.335613   4.15058    3.638633   0.147464   3.629903  
2010            1819      1715      4.408548   5.362387   4.770771   0.223929   4.72371   
2011            1819      1715      4.170742   5.161032   4.605975   0.23929    4.574484  
2012            1819      1715      5.291097   6.10571    5.676333   0.156456   5.668774  
2013            1819      1715      6.354226   7.213871   6.894952   0.162863   6.906936  
2014            1819      1715      3.034871   5.027903   3.867758   0.4722     3.790323  
2015            1819      1715      4.323709   6.131032   5.17676    0.376911   5.148484  
2016            1819      1715      5.087032   6.347613   5.630231   0.261271   5.601613  
2017            1819      1715      4.766871   6.337193   5.568918   0.338949   5.584452  
2018            1819      1715      1.635613   4.471193   2.951469   0.628238   2.911097  
2019            1819      1715      3.247129   4.629452   3.792522   0.309131   3.74529   
2020            1819      1715      5.059806   6.017129   5.464043   0.219685   5.429193  
2021            1819      1715      3.547677   5.939645   4.926287   0.404197   4.977193  
2022            1819      1715      2.401806   5.461355   4.409579   0.571352   4.493548  
2023            1819      1715      5.661226   6.771129   6.30371    0.216475   6.314194