Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            733       712       30.667677  30.913517  30.785592  0.063559   30.780291 
2008            733       712       28.755451  28.890226  28.819781  0.029971   28.819033 
2009            733       712       29.271549  29.483612  29.385768  0.044545   29.383355 
2010            733       712       30.21884   30.402515  30.309907  0.041911   30.306419 
2011            733       712       31.07213   31.320065  31.210009  0.051557   31.223419 
2012            733       712       29.492807  29.647549  29.56884   0.040697   29.571983 
2013            733       712       29.473677  29.743872  29.57903   0.062028   29.579483 
2014            733       712       29.73942   29.997322  29.838049  0.040416   29.837612 
2015            733       712       29.909613  30.163225  30.038221  0.061842   30.041596 
2016            733       712       29.913225  30.197807  30.084799  0.065011   30.093499 
2017            733       712       29.274612  29.741356  29.505306  0.100602   29.496968 
2018            733       712       29.796614  29.974356  29.876233  0.045867   29.87421  
2019            733       712       29.841516  30.220097  30.032758  0.105875   30.024677 
2020            733       712       29.621     30.12513   29.924897  0.126773   29.952274 
2021            733       712       30.233774  30.792162  30.559961  0.1468     30.557452 
2022            733       712       29.53558   29.695612  29.610618  0.044428   29.610517 
2023            733       712       31.660549  31.864677  31.737316  0.041096   31.732613