Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            595       550       12.957036  16.831928  15.626702  1.157606   16.236125 
2008            595       550       11.271414  14.936482  13.288964  0.831878   13.410086 
2009            595       550       10.390036  14.678322  13.407822  1.262459   14.070786 
2010            595       550       8.871964   14.304679  12.550229  1.456542   13.224857 
2011            595       550       9.489285   14.405964  12.800698  1.398046   13.511232 
2012            595       550       13.325621  17.750172  16.29451   1.133138   16.821414 
2013            595       550       11.340428  15.346964  13.926041  1.068262   14.447125 
2014            595       550       9.044321   15.435036  13.454352  1.897695   14.45     
2015            595       550       9.847072   15.651857  13.864525  1.674239   14.729411 
2016            595       550       10.310931  15.799482  14.084364  1.620394   14.932276 
2017            595       550       11.802321  16.348179  14.544024  1.110429   14.963482 
2018            595       550       11.684072  16.703178  14.855405  1.188037   15.262107 
2019            595       550       11.022179  15.428286  13.799433  1.121247   14.285285 
2020            595       550       11.170448  15.414517  13.847895  1.094625   14.355241 
2021            595       550       9.47977    11.208961  10.427613  0.311639   10.432942 
2022            595       550       9.130714   14.068108  12.153235  1.192563   12.581143 
2023            595       550       12.034715  15.987357  14.51646   1.014321   14.911125