Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            890       875       21.566166  21.899401  21.7169    0.090126   21.726034 
2008            890       875       22.119734  22.5499    22.395063  0.089369   22.413834 
2009            890       875       21.627666  21.916267  21.808415  0.063673   21.827267 
2010            890       875       21.394667  21.821867  21.645563  0.110624   21.653833 
2011            890       875       24.014517  24.37838   24.276751  0.068281   24.296034 
2012            890       875       23.929567  24.165133  24.037208  0.05301    24.039499 
2013            890       875       20.693567  21.140766  20.917717  0.118777   20.893566 
2014            890       875       20.836901  21.238533  21.032024  0.109544   21.022266 
2015            890       875       23.529499  24.024933  23.893848  0.119422   23.931334 
2016            890       875       22.089001  22.417233  22.28406   0.056382   22.293766 
2017            890       875       23.316267  23.536566  23.38744   0.056125   23.366966 
2018            890       875       21.420401  21.845533  21.670831  0.107968   21.6924   
2019            890       875       21.274834  21.613701  21.458192  0.076929   21.459366 
2020            890       875       23.17      23.707666  23.49068   0.132978   23.519167 
2021            890       875       21.3543    21.583233  21.446639  0.060215   21.433733 
2022            890       875       22.4328    22.675234  22.549932  0.058094   22.554768 
2023            890       875       22.660931  22.921     22.825265  0.064019   22.84869