Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            710       666       5.383451   6.080516   5.661418   0.162949   5.632339  
2008            710       666       5.957032   6.425452   6.16757    0.122799   6.160597  
2009            710       666       7.130387   7.660645   7.32925    0.127567   7.314339  
2010            710       666       6.667839   7.326323   6.963353   0.171371   6.943081  
2011            710       666       7.880645   8.339097   8.062959   0.116479   8.055097  
2012            710       666       8.404033   8.796549   8.572606   0.093697   8.565774  
2013            710       666       6.158678   6.737936   6.388062   0.132381   6.366048  
2014            710       666       6.879097   7.484419   7.148149   0.146535   7.136097  
2015            710       666       7.816161   8.375646   8.055195   0.142568   8.037887  
2016            710       666       8.102581   8.699806   8.318082   0.138606   8.294806  
2017            710       666       6.304903   7.087548   6.644041   0.190558   6.628468  
2018            710       666       5.756064   6.616903   6.067442   0.230776   6.018677  
2019            710       666       6.849936   7.446742   7.111125   0.143703   7.110677  
2020            710       666       5.930065   6.733097   6.304791   0.198872   6.303371  
2021            710       666       7.468613   8.833871   8.098682   0.337803   8.082613  
2022            710       666       6.91971    7.518129   7.179377   0.146975   7.154403  
2023            710       666       6.333      6.978133   6.641546   0.160493   6.6191