Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            104       66        18.485033  18.759367  18.660419  0.067455   18.677183 
2008            104       66        18.6429    18.8986    18.810398  0.069817   18.833616 
2009            104       66        18.558599  18.723366  18.663738  0.041017   18.67305  
2010            104       66        18.703701  18.8701    18.8108    0.042307   18.824817 
2011            104       66        20.655689  20.884827  20.796447  0.059424   20.814155 
2012            104       66        21.205866  21.369967  21.304972  0.043722   21.316466 
2013            104       66        17.438801  17.8594    17.702589  0.101777   17.73155  
2014            104       66        17.909967  18.241034  18.125823  0.079239   18.146467 
2015            104       66        19.076433  19.518133  19.351368  0.106247   19.381033 
2016            104       66        19.205099  19.561533  19.417334  0.092971   19.432517 
2017            104       66        20.958767  21.250732  21.14642   0.073556   21.173934 
2018            104       66        17.4869    17.864967  17.719896  0.093835   17.746333 
2019            104       66        18.7859    19.1828    19.033368  0.095705   19.051566 
2020            104       66        20.1423    20.405033  20.285619  0.076185   20.295799 
2021            104       66        18.923634  19.116833  19.03864   0.055632   19.046234 
2022            104       66        19.906134  20.216333  20.103105  0.079332   20.119833 
2023            104       66        20.318863  20.56431   20.476581  0.067743   20.492103