Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            526       485       21.918734  22.493534  22.251362  0.110889   22.279867 
2008            526       485       21.177567  21.888533  21.513523  0.135521   21.5007   
2009            526       485       20.6357    21.326067  21.072489  0.164841   21.128033 
2010            526       485       21.651367  22.2124    21.972856  0.114416   21.992466 
2011            526       485       21.254101  21.872034  21.60765   0.122238   21.627966 
2012            526       485       21.401667  22.120367  21.826247  0.137888   21.849966 
2013            526       485       21.893167  22.592466  22.314135  0.138863   22.332001 
2014            526       485       20.692133  21.5881    21.137674  0.188732   21.1234   
2015            526       485       21.915466  22.7652    22.369983  0.164317   22.384132 
2016            526       485       22.7981    23.4494    23.178202  0.120165   23.184666 
2017            526       485       22.286034  23.028767  22.693544  0.143657   22.7237   
2018            526       485       20.754601  21.852467  21.290228  0.219815   21.2731   
2019            526       485       18.957033  20.194599  19.686546  0.259589   19.744867 
2020            526       485       22.295601  22.680433  22.462594  0.078412   22.461933 
2021            526       485       21.185667  22.020067  21.620913  0.164542   21.630867 
2022            526       485       21.88431   22.451138  22.198459  0.107561   22.206758 
2023            526       485       20.211134  21.110968  20.681485  0.199097   20.714067