Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            207       197       17.871037  18.369572  18.172675  0.116548   18.180321 
2008            207       197       18.509035  18.940863  18.78842   0.098835   18.806173 
2009            207       197       18.485178  19.043215  18.794484  0.134236   18.802322 
2010            207       197       14.549107  15.173893  14.908441  0.151547   14.933143 
2011            207       197       16.163179  17.1185    16.684443  0.232489   16.698893 
2012            207       197       16.340725  17.073517  16.723446  0.184846   16.740828 
2013            207       197       17.1495    17.641678  17.467736  0.115251   17.485893 
2014            207       197       14.4495    15.928715  15.240102  0.35502    15.246107 
2015            207       197       17.0305    17.548786  17.310487  0.119041   17.315001 
2016            207       197       16.84269   17.451345  17.182663  0.145009   17.191034 
2017            207       197       17.971643  18.7855    18.397146  0.198987   18.413286 
2018            207       197       16.122643  17.439465  16.82358   0.319189   16.842501 
2019            207       197       15.472678  16.183714  15.866158  0.168489   15.882857 
2020            207       197       16.007103  16.760206  16.423922  0.171054   16.431828 
2021            207       197       16.562269  17.149462  16.956393  0.127966   16.979155 
2022            207       197       12.792178  14.045714  13.461662  0.302043   13.490464 
2023            207       197       14.990857  15.938464  15.488539  0.239745   15.513822