Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            274       250       13.703834  13.999666  13.859313  0.070812   13.86465  
2008            274       250       12.3046    12.786067  12.609766  0.107272   12.6283   
2009            274       250       14.541233  14.964167  14.822038  0.085934   14.8276   
2010            274       250       12.823667  13.214467  13.071607  0.084436   13.083617 
2011            274       250       12.626133  13.1694    12.95801   0.119033   12.971716 
2012            274       250       13.857266  14.2589    14.096024  0.08874    14.098116 
2013            274       250       15.7419    16.467867  16.273932  0.152703   16.3205   
2014            274       250       13.937067  14.631433  14.365763  0.145405   14.386734 
2015            274       250       13.9845    14.4798    14.354417  0.097241   14.388067 
2016            274       250       14.023467  14.621067  14.420337  0.129655   14.436867 
2017            274       250       13.297     13.929167  13.709232  0.135064   13.731667 
2018            274       250       13.943967  14.394667  14.258016  0.094415   14.276984 
2019            274       250       15.525833  16.219566  16.021983  0.143117   16.0603   
2020            274       250       14.776134  16.0828    15.313999  0.29686    15.29915  
2021            274       250       13.241934  13.866034  13.5764    0.151592   13.5786   
2022            274       250       13.964534  14.308267  14.207654  0.072081   14.228583 
2023            274       250       15.128167  15.760467  15.470363  0.155368   15.4838