Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1819      1715      13.723516  15.618387  14.685593  0.495338   14.518419 
2008            1819      1715      13.590613  15.569581  14.638264  0.490525   14.477323 
2009            1819      1715      13.879258  16.782677  15.375959  0.654248   15.322516 
2010            1819      1715      13.941677  15.779871  15.038467  0.370382   14.969903 
2011            1819      1715      14.113452  15.69758   15.01199   0.39792    14.996484 
2012            1819      1715      15.027097  17.180483  16.317245  0.453284   16.273838 
2013            1819      1715      13.734742  15.360806  14.755408  0.359609   14.701871 
2014            1819      1715      13.550742  16.088676  15.02475   0.531765   14.928162 
2015            1819      1715      12.893226  16.216162  14.891459  0.662168   14.867387 
2016            1819      1715      13.757194  16.147936  15.367767  0.466205   15.398548 
2017            1819      1715      12.920742  14.812516  14.165974  0.373952   14.168549 
2018            1819      1715      14.435225  17.095936  16.180535  0.522833   16.145258 
2019            1819      1715      13.754     15.874935  14.872096  0.515635   14.770549 
2020            1819      1715      14.762774  16.349291  15.429291  0.303376   15.444936 
2021            1819      1715      16.370935  17.732452  17.078784  0.317292   17.114193 
2022            1819      1715      14.256193  16.980549  15.72017   0.538618   15.712646 
2023            1819      1715      14.955291  17.375452  16.439226  0.577116   16.552967