Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            300       271       19.1973    19.698767  19.434498  0.127583   19.3992   
2008            300       271       18.9744    19.325634  19.099523  0.107448   19.061867 
2009            300       271       18.034967  18.5891    18.223486  0.118784   18.189234 
2010            300       271       19.618166  19.976101  19.75604   0.075781   19.737566 
2011            300       271       19.884501  20.7691    20.317977  0.244944   20.255167 
2012            300       271       20.195232  20.868534  20.534122  0.165201   20.514299 
2013            300       271       18.417801  18.820801  18.609742  0.08506    18.596333 
2014            300       271       19.2332    19.959267  19.608978  0.173382   19.5842   
2015            300       271       18.862566  20.009068  19.540736  0.303573   19.5889   
2016            300       271       18.5186    19.124533  18.740781  0.181224   18.670433 
2017            300       271       18.217133  18.749968  18.412218  0.138628   18.369734 
2018            300       271       18.768667  19.367966  19.064794  0.172349   19.054367 
2019            300       271       19.344467  19.963734  19.650059  0.157759   19.642267 
2020            300       271       19.107533  19.348034  19.219551  0.052251   19.213566 
2021            300       271       19.173834  19.525566  19.323828  0.064665   19.317699 
2022            300       271       19.5201    19.825634  19.667369  0.074904   19.686199 
2023            300       271       18.827633  19.286066  19.031417  0.0874     19.019899