Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            104       66        18.134533  18.642401  18.457533  0.124607   18.482616 
2008            104       66        16.120001  16.780899  16.533104  0.175964   16.57555  
2009            104       66        18.702734  19.194599  19.017831  0.129369   19.046716 
2010            104       66        19.003067  19.381399  19.234522  0.089038   19.24555  
2011            104       66        17.639967  18.272833  18.041497  0.151778   18.070833 
2012            104       66        15.825833  16.5546    16.283182  0.174232   16.31445  
2013            104       66        17.498966  18.155533  17.910592  0.155442   17.93395  
2014            104       66        17.038633  17.618032  17.40359   0.145463   17.436483 
2015            104       66        19.785366  20.287767  20.108983  0.120419   20.135217 
2016            104       66        18.163767  18.768999  18.546338  0.147812   18.570883 
2017            104       66        17.487101  18.108734  17.872865  0.149121   17.89485  
2018            104       66        18.068666  18.703167  18.459066  0.14912    18.476117 
2019            104       66        17.924099  18.517366  18.304587  0.142202   18.3336   
2020            104       66        20.132734  20.648867  20.471741  0.128962   20.501667 
2021            104       66        15.996367  16.753767  16.462928  0.178329   16.483667 
2022            104       66        17.957378  18.572586  18.351255  0.150171   18.381948 
2023            104       66        17.283667  17.995733  17.736994  0.169155   17.7631