Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            563       558       12.672238  12.96914   12.827822  0.077565   12.838469 
2008            563       558       12.607746  12.849882  12.73919   0.063758   12.746817 
2009            563       558       12.88346   13.041622  12.96146   0.04985    12.957679 
2010            563       558       13.019373  13.204685  13.121362  0.045344   13.116744 
2011            563       558       12.977868  13.059222  13.0216    0.02323    13.01925  
2012            563       558       12.993413  13.07941   13.044512  0.022727   13.049501 
2013            563       558       12.886734  13.022142  12.951847  0.035972   12.945268 
2014            563       558       14.592784  14.683043  14.636441  0.024071   14.630856 
2015            563       558       14.730732  14.82443   14.792986  0.017963   14.794359 
2016            563       558       13.719454  13.812636  13.780934  0.024683   13.786884 
2017            563       558       13.369884  13.554077  13.463276  0.044943   13.46255  
2018            563       558       13.733181  13.862603  13.818766  0.023655   13.820531 
2019            563       558       13.849721  13.921529  13.894655  0.018425   13.897219 
2020            563       558       13.813631  14.380186  14.063764  0.1379     14.051013 
2021            563       558       13.389162  13.91894   13.602978  0.134839   13.583204 
2022            563       558       13.072737  13.261838  13.18414   0.048797   13.183957 
2023            563       558       13.735392  14.149738  13.922503  0.097562   13.912733