Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            131       110       17.926838  18.147968  18.026703  0.056538   18.022758 
2008            131       110       18.901709  19.042677  18.964947  0.035941   18.961419 
2009            131       110       18.04129   18.277872  18.174191  0.056124   18.178806 
2010            131       110       19.926807  20.089773  20.001292  0.04277    20.000194 
2011            131       110       19.573839  19.77742   19.666307  0.054977   19.66321  
2012            131       110       19.73287   20.093613  19.90173   0.081204   19.901871 
2013            131       110       20.496033  20.660709  20.57948   0.043079   20.58013  
2014            131       110       17.793324  18.140516  18.002547  0.079311   18.010081 
2015            131       110       19.057646  19.252388  19.163396  0.051158   19.165693 
2016            131       110       18.985291  19.110903  19.038023  0.031781   19.033854 
2017            131       110       18.433226  18.617258  18.526911  0.044104   18.526145 
2018            131       110       19.397709  19.627451  19.508739  0.05481    19.501984 
2019            131       110       20.632839  20.836323  20.743469  0.053681   20.744952 
2020            131       110       20.217258  20.471064  20.336382  0.065437   20.334242 
2021            131       110       19.393677  19.759806  19.560238  0.095371   19.558516 
2022            131       110       18.965485  19.294323  19.116425  0.081759   19.107968 
2023            131       110       21.348387  21.844549  21.588595  0.120191   21.587161