Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1080      952       27.774166  28.110399  28.008547  0.064671   28.02015  
2008            1080      952       29.543034  29.909567  29.709434  0.079351   29.704416 
2009            1080      952       28.643299  29.084633  28.941358  0.080861   28.9383   
2010            1080      952       29.709467  30.1248    29.904033  0.103886   29.911301 
2011            1080      952       29.626734  29.929667  29.760533  0.070435   29.744367 
2012            1080      952       27.717133  28.094767  27.91172   0.06502    27.899266 
2013            1080      952       28.491867  28.804634  28.699454  0.055217   28.70335  
2014            1080      952       28.234566  28.508566  28.403441  0.062526   28.417233 
2015            1080      952       28.767366  29.3391    29.077179  0.125353   29.081067 
2016            1080      952       29.028801  29.365633  29.257409  0.052364   29.258666 
2017            1080      952       26.953533  27.3519    27.161718  0.123717   27.184684 
2018            1080      952       28.879932  29.712933  29.340273  0.209985   29.37315  
2019            1080      952       29.0898    29.330833  29.210128  0.047063   29.208983 
2020            1080      952       28.0823    28.356001  28.26914   0.07141    28.295866 
2021            1080      952       26.984167  27.887266  27.51918   0.234976   27.57975  
2022            1080      952       29.538033  29.982834  29.75984   0.140713   29.771117 
2023            1080      952       27.792767  28.337101  28.133685  0.129835   28.158383