Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            120       53        18.933968  19.165701  19.075807  0.042102   19.082033 
2008            120       53        19.216766  19.4217    19.348983  0.04184    19.356434 
2009            120       53        18.499901  18.847967  18.708443  0.080173   18.713667 
2010            120       53        19.014633  19.160099  19.112663  0.037701   19.124701 
2011            120       53        21.339138  21.509724  21.451615  0.035936   21.455656 
2012            120       53        21.704466  21.859167  21.812929  0.037095   21.821133 
2013            120       53        18.422934  18.712034  18.620548  0.060034   18.632133 
2014            120       53        18.354267  18.625334  18.527153  0.058684   18.533466 
2015            120       53        20.007801  20.323366  20.20554   0.067605   20.209633 
2016            120       53        19.929966  20.244766  20.146781  0.069004   20.1556   
2017            120       53        21.508366  21.560966  21.541655  0.010582   21.5425   
2018            120       53        18.402599  18.827366  18.677578  0.092384   18.685566 
2019            120       53        19.382633  19.757999  19.615501  0.08436    19.622232 
2020            120       53        20.7724    20.961901  20.902958  0.041819   20.906334 
2021            120       53        19.3419    19.439966  19.402789  0.025003   19.403767 
2022            120       53        20.620367  20.905134  20.801372  0.063965   20.810766 
2023            120       53        20.959482  21.167793  21.110019  0.050382   21.129827