Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1080      952       13.843129  16.320839  15.267275  0.596282   15.345048 
2008            1080      952       13.295065  16.421677  15.087388  0.767639   15.199435 
2009            1080      952       13.972548  16.397419  15.355151  0.588579   15.443468 
2010            1080      952       12.291032  14.717581  13.688356  0.626956   13.784919 
2011            1080      952       11.339968  13.974194  12.868115  0.681972   12.987258 
2012            1080      952       15.163355  17.151711  16.276563  0.487937   16.337371 
2013            1080      952       15.673549  17.536161  16.699727  0.456977   16.761065 
2014            1080      952       12.718516  15.342484  14.165052  0.660849   14.229887 
2015            1080      952       14.996839  17.42058   16.344207  0.605295   16.402209 
2016            1080      952       13.975839  16.650354  15.398276  0.662425   15.437339 
2017            1080      952       15.377548  17.56271   16.674378  0.554311   16.784    
2018            1080      952       13.32171   16.264549  14.950404  0.719056   14.995226 
2019            1080      952       14.956549  16.870968  16.061744  0.505261   16.124468 
2020            1080      952       14.026968  16.745129  15.459791  0.69324    15.479661 
2021            1080      952       13.452613  15.694742  14.619061  0.560996   14.634903 
2022            1080      952       12.944097  16.792839  14.997252  0.93519    15.144032 
2023            1080      952       13.361096  16.527225  15.135632  0.773699   15.236952