Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1808      1738      12.469807  14.059936  13.338924  0.387351   13.37029  
2008            1808      1738      11.965581  13.659097  12.861393  0.424287   12.890451 
2009            1808      1738      13.219774  14.628936  13.926208  0.33579    13.935565 
2010            1808      1738      11.869     13.665161  12.754042  0.413523   12.756387 
2011            1808      1738      11.184322  12.830807  12.029973  0.381462   12.049968 
2012            1808      1738      14.456903  15.581258  14.924181  0.231994   14.893258 
2013            1808      1738      14.394322  15.916     15.2066    0.349389   15.231694 
2014            1808      1738      10.183193  12.017161  11.161492  0.427483   11.192274 
2015            1808      1738      12.545581  13.998129  13.334599  0.314524   13.362613 
2016            1808      1738      11.299581  12.330032  11.892611  0.230127   11.932129 
2017            1808      1738      14.26942   15.163838  14.687466  0.194239   14.667774 
2018            1808      1738      9.646871   11.586129  10.719374  0.438257   10.759952 
2019            1808      1738      12.996839  13.980419  13.527554  0.205544   13.527951 
2020            1808      1738      13.816322  14.397064  14.082492  0.120585   14.06371  
2021            1808      1738      11.569     12.425516  12.051659  0.185837   12.069677 
2022            1808      1738      11.964452  12.902742  12.507242  0.226408   12.544613 
2023            1808      1738      13.415613  14.067645  13.703087  0.132626   13.676209