Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            553       489       27.378666  27.696133  27.569619  0.073586   27.575701 
2008            553       489       28.799232  29.141399  29.037063  0.067919   29.054768 
2009            553       489       27.351566  28.096966  27.791058  0.135977   27.824699 
2010            553       489       29.619699  30.120466  29.887741  0.095062   29.8978   
2011            553       489       29.159733  29.644667  29.48758   0.116799   29.516567 
2012            553       489       27.275967  27.500834  27.393873  0.042124   27.398766 
2013            553       489       28.202034  28.5672    28.402112  0.076019   28.3967   
2014            553       489       28.064034  28.389166  28.270347  0.079496   28.285233 
2015            553       489       29.2341    29.629999  29.416403  0.091529   29.415701 
2016            553       489       28.127733  28.877333  28.502062  0.1327     28.4939   
2017            553       489       27.587366  28.079166  27.783393  0.125102   27.7658   
2018            553       489       28.514166  28.835867  28.723625  0.06982    28.737366 
2019            553       489       28.712799  29.036568  28.925613  0.074663   28.939833 
2020            553       489       28.318333  28.506001  28.428268  0.042842   28.432734 
2021            553       489       27.722799  28.423866  28.027719  0.18288    27.993767 
2022            553       489       29.389334  29.8375    29.582685  0.115593   29.57     
2023            553       489       27.068167  27.474266  27.294812  0.081743   27.298567