Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            469       445       22.078533  22.718634  22.465408  0.141199   22.469866 
2008            469       445       21.715     22.203234  22.020076  0.111739   22.0294   
2009            469       445       20.935801  21.505833  21.270211  0.143016   21.281834 
2010            469       445       22.167067  22.5063    22.321358  0.088736   22.318701 
2011            469       445       21.648533  22.219334  21.962452  0.136516   21.967199 
2012            469       445       21.672501  22.461233  22.146967  0.174175   22.169466 
2013            469       445       22.245399  22.8568    22.617955  0.154342   22.622766 
2014            469       445       21.8391    22.3088    22.056811  0.116848   22.065533 
2015            469       445       22.450533  23.107067  22.846895  0.145197   22.8592   
2016            469       445       23.344433  23.808599  23.570777  0.100481   23.562599 
2017            469       445       22.920933  23.404734  23.141195  0.109806   23.102301 
2018            469       445       21.824167  22.574867  22.160635  0.179006   22.138233 
2019            469       445       20.053734  20.937033  20.545418  0.212386   20.5742   
2020            469       445       22.823668  23.100067  22.949154  0.040992   22.943832 
2021            469       445       21.6061    22.571568  22.148773  0.233574   22.160868 
2022            469       445       22.242863  22.72093   22.481055  0.128655   22.464069 
2023            469       445       21.387199  21.832899  21.578949  0.095792   21.567934