Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            563       558       12.400634  12.962067  12.700094  0.150736   12.701017 
2008            563       558       12.195267  12.604533  12.396793  0.119418   12.390183 
2009            563       558       13.857467  14.319767  14.085855  0.134739   14.080933 
2010            563       558       12.133266  12.6582    12.441607  0.155575   12.457316 
2011            563       558       12.667867  13.001766  12.857832  0.09648    12.871583 
2012            563       558       11.874066  12.299267  12.063696  0.103765   12.0764   
2013            563       558       13.267134  13.478333  13.375119  0.058397   13.354983 
2014            563       558       12.827567  13.204233  13.001775  0.111808   12.988567 
2015            563       558       13.789933  14.0569    13.896899  0.075125   13.8905   
2016            563       558       13.268133  13.507366  13.378256  0.062558   13.372817 
2017            563       558       12.647533  13.033433  12.824894  0.099071   12.8124   
2018            563       558       12.589633  13.037967  12.798766  0.112823   12.789283 
2019            563       558       14.143833  14.429133  14.324654  0.076429   14.34195  
2020            563       558       14.0943    15.539066  14.667873  0.378964   14.6156   
2021            563       558       14.0056    15.0819    14.474997  0.277999   14.469    
2022            563       558       12.432967  12.852933  12.641749  0.112702   12.6495   
2023            563       558       14.133233  15.0632    14.563816  0.238322   14.5471