Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            275       142       17.950733  18.544733  18.332984  0.157773   18.374133 
2008            275       142       17.725533  18.3808    18.135882  0.158375   18.17325  
2009            275       142       17.882799  18.3004    18.156038  0.103097   18.184649 
2010            275       142       18.161167  18.525267  18.397474  0.090213   18.416316 
2011            275       142       19.762621  20.334379  20.104484  0.131453   20.126466 
2012            275       142       20.637434  21.047001  20.905693  0.099397   20.928766 
2013            275       142       16.754766  17.504333  17.231755  0.194497   17.273701 
2014            275       142       17.455133  18.282301  17.990551  0.201665   18.043167 
2015            275       142       18.353701  19.153566  18.847911  0.205437   18.8903   
2016            275       142       18.268801  18.941166  18.724397  0.168813   18.783466 
2017            275       142       20.319933  20.719     20.591218  0.10261    20.622366 
2018            275       142       16.834499  17.694166  17.392304  0.214883   17.4549   
2019            275       142       18.184433  18.754934  18.555299  0.155411   18.595366 
2020            275       142       20.1408    20.510733  20.382387  0.100864   20.410483 
2021            275       142       18.819933  19.0478    18.971896  0.061177   18.985466 
2022            275       142       19.564501  20.086233  19.882846  0.135223   19.9074   
2023            275       142       19.74069   20.123827  19.993491  0.094981   20.018827