Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1073      658       2.899194   4.302452   3.572992   0.294853   3.588307  
2008            1073      658       4.694484   5.789613   5.361836   0.231795   5.415226  
2009            1073      658       3.558064   4.583452   4.279388   0.207174   4.336177  
2010            1073      658       4.899806   5.669806   5.336352   0.212667   5.360613  
2011            1073      658       3.961968   5.335839   4.810059   0.312258   4.806032  
2012            1073      658       7.352549   8.377871   8.088408   0.168234   8.107371  
2013            1073      658       3.716645   4.693581   4.495305   0.178789   4.541145  
2014            1073      658       1.864064   3.183193   2.753703   0.242582   2.782     
2015            1073      658       1.825452   3.18729    2.723867   0.259935   2.749097  
2016            1073      658       5.878065   6.763968   6.5806     0.146271   6.622129  
2017            1073      658       4.218548   5.39358    4.956024   0.20116    4.942049  
2018            1073      658       4.062677   4.722645   4.512268   0.11281    4.528597  
2019            1073      658       3.706548   4.822871   4.483135   0.201258   4.527097  
2020            1073      658       6.615032   7.419903   7.221704   0.130373   7.220952  
2021            1073      658       4.833419   5.718581   5.512433   0.133      5.534613  
2022            1073      658       4.884193   5.859903   5.511411   0.161325   5.527532  
2023            1073      658       5.396839   6.261968   5.974829   0.185656   6.017532