Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            310       302       22.704332  23.581066  23.066577  0.207195   23.013634 
2008            310       302       22.2122    22.722366  22.447536  0.124632   22.478001 
2009            310       302       21.432966  22.006001  21.670151  0.170315   21.605133 
2010            310       302       22.507467  23.021034  22.711693  0.145517   22.63645  
2011            310       302       22.2255    22.646767  22.37931   0.115383   22.32685  
2012            310       302       22.359667  23.117399  22.687351  0.194755   22.633117 
2013            310       302       22.772034  22.945499  22.882204  0.032224   22.886201 
2014            310       302       22.273466  23.112     22.663045  0.238649   22.624934 
2015            310       302       22.932034  23.2481    23.073544  0.069544   23.07095  
2016            310       302       23.757799  24.296101  23.969846  0.137949   23.921516 
2017            310       302       23.336201  24.181166  23.746924  0.219731   23.729533 
2018            310       302       22.510866  23.222334  22.913743  0.180271   22.906051 
2019            310       302       20.856434  21.567966  21.297731  0.200298   21.349833 
2020            310       302       22.997433  23.402767  23.233362  0.121769   23.208384 
2021            310       302       22.454166  23.431334  22.865075  0.243248   22.796834 
2022            310       302       22.720793  23.492001  23.00695   0.219937   22.901397 
2023            310       302       21.826468  22.927366  22.280601  0.312109   22.191366