Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            207       197       19.208612  19.50316   19.36477   0.071527   19.367033 
2008            207       197       18.634548  19.007     18.802511  0.091977   18.769516 
2009            207       197       19.028484  19.286354  19.190338  0.068009   19.204645 
2010            207       197       16.493839  16.60113   16.570402  0.020021   16.570194 
2011            207       197       19.285355  19.429773  19.387048  0.03786    19.401741 
2012            207       197       19.675838  20.001741  19.850782  0.085871   19.863161 
2013            207       197       17.811871  18.221226  18.067404  0.090658   18.087322 
2014            207       197       15.459774  16.351322  15.95838   0.219484   15.982162 
2015            207       197       17.708935  18.117516  17.941326  0.099884   17.956581 
2016            207       197       19.595484  19.841581  19.730987  0.050784   19.729935 
2017            207       197       19.677032  20.270903  19.996386  0.143273   20.013226 
2018            207       197       19.766581  20.262581  20.018341  0.125093   20.027775 
2019            207       197       18.104807  18.614935  18.39579   0.118266   18.395226 
2020            207       197       20.169323  20.323904  20.259011  0.034243   20.263645 
2021            207       197       19.026548  20.017548  19.614808  0.259471   19.632967 
2022            207       197       15.565613  16.152065  15.855026  0.150573   15.868032 
2023            207       197       21.141613  21.842386  21.464356  0.157309   21.463968