Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            469       445       29.2691    29.669367  29.503813  0.081798   29.517799 
2008            469       445       27.899567  28.119267  27.982977  0.05369    27.968901 
2009            469       445       28.835833  29.203568  29.001235  0.088918   28.997833 
2010            469       445       29.194134  29.4468    29.3602    0.051706   29.367666 
2011            469       445       29.257633  29.514299  29.344269  0.053828   29.3449   
2012            469       445       28.4321    28.7388    28.661797  0.078126   28.6889   
2013            469       445       29.255466  29.434967  29.327266  0.037012   29.325399 
2014            469       445       28.8372    29.144766  29.042538  0.078696   29.0676   
2015            469       445       28.938168  29.173967  29.074925  0.060074   29.075966 
2016            469       445       30.080999  30.350634  30.231544  0.068615   30.233534 
2017            469       445       28.198534  28.379     28.277595  0.037545   28.279966 
2018            469       445       29.144899  29.311899  29.264655  0.0316     29.268534 
2019            469       445       29.639067  29.972967  29.821576  0.065118   29.841967 
2020            469       445       28.3253    28.8053    28.6035    0.106516   28.626467 
2021            469       445       29.083799  29.306     29.233341  0.053312   29.244867 
2022            469       445       29.542467  29.755867  29.672942  0.058692   29.691133 
2023            469       445       30.205866  30.589266  30.461815  0.090949   30.485466