Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            15120     14316     10.591066  14.806933  11.986332  0.985128   11.911433 
2008            15120     14316     10.582433  15.0111    12.083276  1.086135   11.736617 
2009            15120     14316     10.851033  15.5339    12.258319  1.051617   11.96335  
2010            15120     14316     10.5733    14.768833  11.869806  0.94493    11.69265  
2011            15120     14316     10.98      15.195467  12.196195  1.018301   11.815717 
2012            15120     14316     11.051367  15.198433  12.306722  1.041631   12.0396   
2013            15120     14316     10.6794    15.958834  12.569389  1.457009   12.177134 
2014            15120     14316     10.994534  16.033167  12.298384  1.166689   11.798883 
2015            15120     14316     11.117666  14.785767  12.217416  0.852447   11.833667 
2016            15120     14316     10.721467  15.098333  12.001826  1.014193   11.651633 
2017            15120     14316     11.054967  15.811033  12.396496  1.184017   11.915617 
2018            15120     14316     10.752033  14.8745    12.072498  0.937927   11.829833 
2019            15120     14316     10.9278    16.098     12.491601  1.281303   12.073984 
2020            15120     14316     11.1878    17.316866  13.248477  1.320247   13.172416 
2021            15120     14316     10.441033  15.2501    12.484865  1.24637    12.4493   
2022            15120     14316     11.095734  16.4729    13.298286  1.257976   13.374183 
2023            15120     14316     11.347234  15.7417    12.829141  1.083442   12.67345