Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            310       302       29.437067  29.756233  29.600003  0.078268   29.61065  
2008            310       302       27.8624    28.102301  27.986268  0.060563   27.987333 
2009            310       302       29.031334  29.256599  29.148601  0.05246    29.1548   
2010            310       302       29.219833  29.386967  29.31371   0.030262   29.31605  
2011            310       302       29.390566  29.590834  29.510965  0.042756   29.518451 
2012            310       302       28.032999  28.631067  28.366497  0.179852   28.388    
2013            310       302       29.275034  29.453833  29.389598  0.029796   29.389266 
2014            310       302       28.7894    29.134033  28.978566  0.09302    28.979816 
2015            310       302       28.971399  29.234867  29.138272  0.066799   29.1529   
2016            310       302       30.099367  30.377434  30.274208  0.082068   30.285967 
2017            310       302       28.192066  28.448133  28.329861  0.055334   28.3305   
2018            310       302       29.148067  29.382433  29.258877  0.05971    29.245033 
2019            310       302       29.593334  29.920033  29.715349  0.052596   29.715533 
2020            310       302       28.7006    28.947433  28.848025  0.050606   28.8561   
2021            310       302       29.208366  29.487734  29.36457   0.090148   29.400283 
2022            310       302       29.561501  29.740067  29.636923  0.040355   29.632684 
2023            310       302       30.193899  30.501801  30.408189  0.068092   30.431684