Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            559       485       11.471548  13.449806  12.412928  0.515659   12.37342  
2008            559       485       9.945807   12.07229   10.861836  0.568066   10.810904 
2009            559       485       10.503806  12.184548  11.163151  0.431072   11.112484 
2010            559       485       7.72471    9.434161   8.559152   0.460759   8.521839  
2011            559       485       11.57871   12.883742  12.247227  0.369671   12.24458  
2012            559       485       10.385806  11.311419  10.867832  0.26756    10.852097 
2013            559       485       10.084355  11.811419  10.88417   0.414896   10.847161 
2014            559       485       9.657097   11.064194  10.455458  0.352603   10.487    
2015            559       485       13.756613  14.600677  14.255107  0.216919   14.28629  
2016            559       485       10.048451  11.529967  10.793045  0.382577   10.747322 
2017            559       485       10.759645  12.222065  11.574429  0.394579   11.60058  
2018            559       485       9.088806   9.835936   9.57205    0.155327   9.609871  
2019            559       485       9.73071    10.948194  10.42964   0.284739   10.47429  
2020            559       485       11.369419  12.903709  12.197902  0.432159   12.201903 
2021            559       485       11.142549  12.240161  11.740809  0.297765   11.769096 
2022            559       485       10.408968  12.176354  11.331476  0.487323   11.346387 
2023            559       485       10.4376    11.050333  10.789163  0.134641   10.802667