Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            2800      2779      20.892071  23.063429  21.955157  0.55184    22.019001 
2008            2800      2779      23.080517  24.192379  23.719006  0.272828   23.768311 
2009            2800      2779      19.626392  22.007463  20.899383  0.610975   20.932035 
2010            2800      2779      19.859072  22.196178  20.974917  0.567236   20.997679 
2011            2800      2779      20.877035  22.820749  21.941116  0.536129   21.970572 
2012            2800      2779      22.543139  24.070862  23.400318  0.394739   23.455482 
2013            2800      2779      21.806749  23.880678  22.752332  0.534682   22.743143 
2014            2800      2779      23.515249  25.119036  24.502501  0.398155   24.61075  
2015            2800      2779      19.434643  22.456821  20.687266  0.70915    20.632643 
2016            2800      2779      19.847654  23.399586  21.361037  0.900731   21.308449 
2017            2800      2779      22.741785  23.940178  23.473     0.336803   23.573715 
2018            2800      2779      22.991858  24.501036  23.914411  0.334741   24.004858 
2019            2800      2779      23.101107  24.667965  24.022699  0.405691   24.107357 
2020            2800      2779      22.546724  24.871723  23.651208  0.581147   23.650379 
2021            2800      2779      22.370308  24.010962  23.302509  0.428609   23.383808 
2022            2800      2779      21.095249  23.707251  22.533116  0.703665   22.599678 
2023            2800      2779      23.958607  25.021357  24.594055  0.249244   24.658108