Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            943       831       21.559134  22.4044    21.966734  0.221646   21.9468   
2008            943       831       20.0821    20.792034  20.393231  0.186452   20.385233 
2009            943       831       22.276733  22.994301  22.701363  0.177224   22.7381   
2010            943       831       21.877934  22.385166  22.148999  0.121919   22.132534 
2011            943       831       21.159634  21.6371    21.441961  0.110809   21.467167 
2012            943       831       19.8321    21.171133  20.451475  0.33039    20.3848   
2013            943       831       22.028801  22.9627    22.508333  0.226235   22.491734 
2014            943       831       19.984699  21.0777    20.552012  0.273075   20.577932 
2015            943       831       24.348766  24.9998    24.646632  0.146952   24.639732 
2016            943       831       21.203733  22.140833  21.72995   0.205421   21.780233 
2017            943       831       21.367233  22.243032  21.797896  0.175837   21.822767 
2018            943       831       22.723368  23.788166  23.248515  0.248459   23.300266 
2019            943       831       22.232134  23.829367  23.059905  0.3788     23.102434 
2020            943       831       23.491133  23.960434  23.738666  0.107048   23.752466 
2021            943       831       20.838167  21.6943    21.237477  0.193809   21.227633 
2022            943       831       22.674034  23.556276  23.066706  0.210783   23.033344 
2023            943       831       22.282633  22.850134  22.507221  0.130007   22.490801