Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            277       214       22.089394  22.612465  22.269841  0.094475   22.272787 
2008            277       214       21.838982  22.400019  21.994574  0.091803   21.982343 
2009            277       214       22.115471  22.664066  22.292313  0.090233   22.293202 
2010            277       214       21.591957  22.094261  21.750201  0.083573   21.746158 
2011            277       214       22.064983  22.561407  22.211855  0.081685   22.205574 
2012            277       214       23.211601  23.588718  23.311488  0.06035    23.298965 
2013            277       214       21.738676  22.28026   21.883991  0.089081   21.867313 
2014            277       214       21.197462  21.729063  21.345191  0.085921   21.333056 
2015            277       214       22.203903  22.71435   22.371788  0.092558   22.369099 
2016            277       214       22.678246  23.248104  22.862601  0.102725   22.859854 
2017            277       214       22.902487  23.416584  23.076452  0.09608    23.071653 
2018            277       214       22.139902  22.778088  22.351183  0.117192   22.342966 
2019            277       214       22.017208  22.685364  22.248258  0.127646   22.247393 
2020            277       214       22.786074  23.123295  22.909583  0.061343   22.915923 
2021            277       214       22.560892  22.809036  22.634785  0.039664   22.632284 
2022            277       214       22.649321  22.946035  22.737822  0.042396   22.735072 
2023            277       214       23.455305  23.555553  23.502962  0.016551   23.50659