Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1706      1017      20.958967  21.208799  21.098372  0.050228   21.101366 
2008            1706      1017      21.750401  22.132267  21.922789  0.072399   21.913166 
2009            1706      1017      20.5996    21.122168  20.988027  0.115535   21.0369   
2010            1706      1017      20.7763    21.456301  21.311135  0.12463    21.337799 
2011            1706      1017      23.456139  23.786758  23.664702  0.075594   23.671553 
2012            1706      1017      23.412767  23.665234  23.567372  0.05588    23.5704   
2013            1706      1017      20.126101  20.352734  20.220547  0.061424   20.209467 
2014            1706      1017      20.662634  20.959133  20.828811  0.061886   20.8403   
2015            1706      1017      23.173     23.542099  23.33962   0.098911   23.332199 
2016            1706      1017      21.629133  22.059366  21.935239  0.092316   21.975468 
2017            1706      1017      23.438499  23.66      23.57279   0.059878   23.572134 
2018            1706      1017      20.851133  21.3083    21.113507  0.092314   21.122267 
2019            1706      1017      20.802401  21.1392    21.011982  0.083519   21.039499 
2020            1706      1017      22.823067  23.033266  22.925955  0.056661   22.928766 
2021            1706      1017      20.560167  21.093933  20.809918  0.143676   20.8347   
2022            1706      1017      21.8507    22.241899  22.111573  0.109805   22.155067 
2023            1706      1017      21.611551  22.120758  21.843303  0.136332   21.833794