Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            158       154       17.669678  18.289162  17.986334  0.154369   17.985613 
2008            158       154       17.775484  18.202419  17.991046  0.108473   17.988435 
2009            158       154       17.454678  17.890871  17.66955   0.107453   17.671403 
2010            158       154       15.975871  16.596451  16.273566  0.154328   16.269822 
2011            158       154       15.139129  15.781968  15.457727  0.159378   15.455758 
2012            158       154       17.369452  17.862614  17.58783   0.12203    17.577097 
2013            158       154       18.302549  18.772678  18.534163  0.122544   18.535403 
2014            158       154       16.454485  16.972612  16.708348  0.128093   16.707645 
2015            158       154       17.440258  18.045097  17.729566  0.154352   17.732516 
2016            158       154       18.199709  18.778645  18.482985  0.144663   18.484597 
2017            158       154       18.379032  19.050838  18.701954  0.168129   18.695146 
2018            158       154       15.995452  16.896355  16.441246  0.227065   16.436097 
2019            158       154       16.430677  16.99342   16.667663  0.141759   16.651629 
2020            158       154       17.213097  18.080839  17.626444  0.216105   17.621871 
2021            158       154       15.445645  16.468645  15.914438  0.254693   15.902774 
2022            158       154       16.630259  17.444613  17.011012  0.21322    16.99629  
2023            158       154       17.817226  18.64529   18.209354  0.208579   18.201386