Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1320      1260      6.259387   6.530387   6.381286   0.05519    6.380194  
2008            1320      1260      4.458807   4.926032   4.693578   0.101282   4.688016  
2009            1320      1260      3.523226   4.378323   3.936659   0.212212   3.940097  
2010            1320      1260      3.754774   5.031613   4.319622   0.302095   4.332242  
2011            1320      1260      2.775097   5.053484   3.903575   0.603828   3.909048  
2012            1320      1260      5.498677   6.703548   6.101122   0.304681   6.12      
2013            1320      1260      5.113161   6.770161   5.782022   0.3869     5.737694  
2014            1320      1260      3.06829    4.579806   3.730843   0.369374   3.730468  
2015            1320      1260      3.95871    5.693516   4.741354   0.408164   4.733065  
2016            1320      1260      5.823516   6.867355   6.368742   0.263763   6.371484  
2017            1320      1260      4.973      6.279677   5.524963   0.285664   5.497565  
2018            1320      1260      2.356581   4.205903   3.158722   0.408373   3.1685    
2019            1320      1260      3.289742   4.932419   4.092952   0.359099   4.108323  
2020            1320      1260      4.617516   5.770129   5.176416   0.270888   5.175194  
2021            1320      1260      4.52871    5.756484   5.187192   0.301333   5.207565  
2022            1320      1260      4.908355   6.890387   5.813805   0.471559   5.844758  
2023            1320      1260      5.53771    6.300774   5.924637   0.197248   5.931242