Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1706      1017      30.410322  30.766226  30.569441  0.086118   30.554968 
2008            1706      1017      28.772451  29.069839  28.9295    0.060625   28.930515 
2009            1706      1017      30.000193  30.406517  30.18036   0.098675   30.159807 
2010            1706      1017      30.488838  30.716064  30.595896  0.053968   30.584709 
2011            1706      1017      31.145033  31.446646  31.279636  0.073824   31.276871 
2012            1706      1017      29.681774  29.98642   29.809102  0.086726   29.79771  
2013            1706      1017      29.731936  29.983904  29.827736  0.05796    29.809162 
2014            1706      1017      29.906452  30.27071   30.051368  0.087896   30.050968 
2015            1706      1017      29.795742  30.196613  29.957611  0.089444   29.938936 
2016            1706      1017      29.870871  30.167419  29.979896  0.061945   29.962709 
2017            1706      1017      29.548098  29.934258  29.727467  0.086607   29.712162 
2018            1706      1017      30.011904  30.384773  30.198422  0.081826   30.200291 
2019            1706      1017      29.732935  29.980646  29.829845  0.055268   29.822807 
2020            1706      1017      30.283064  30.62816   30.457129  0.082558   30.451128 
2021            1706      1017      30.569613  30.889709  30.711798  0.068859   30.710903 
2022            1706      1017      29.716969  29.959999  29.827342  0.06719    29.815678 
2023            1706      1017      31.685516  32.018677  31.800928  0.08513    31.77