Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            710       666       8.941291   9.310129   9.193803   0.071987   9.201403  
2008            710       666       8.759548   9.284936   9.078319   0.098444   9.061129  
2009            710       666       9.113322   9.354581   9.220188   0.064234   9.210903  
2010            710       666       9.596903   9.91342    9.768839   0.075724   9.772726  
2011            710       666       8.732064   9.136903   8.960227   0.102264   8.974162  
2012            710       666       10.740193  11.285677  11.054008  0.114217   11.074081 
2013            710       666       9.547838   10.033129  9.830979   0.093441   9.845807  
2014            710       666       8.595129   8.963323   8.832429   0.069966   8.850742  
2015            710       666       8.160581   8.459323   8.305562   0.067457   8.308177  
2016            710       666       8.829839   9.047839   8.948258   0.062844   8.958903  
2017            710       666       8.011645   8.506968   8.259466   0.114583   8.259661  
2018            710       666       10.17671   10.602806  10.400682  0.07286    10.40942  
2019            710       666       8.332742   8.866451   8.663281   0.119535   8.683532  
2020            710       666       8.667452   9.154871   8.897222   0.124075   8.882177  
2021            710       666       9.793451   10.228258  10.074098  0.085963   10.091839 
2022            710       666       9.580355   9.993322   9.809107   0.096652   9.827951  
2023            710       666       9.953548   10.348742  10.105519  0.112456   10.066661