Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            2054      1756      17.661419  19.926128  18.897654  0.446689   18.93629  
2008            2054      1756      17.154194  19.044001  17.890354  0.350425   17.875193 
2009            2054      1756      17.709936  19.845516  18.662808  0.490041   18.625645 
2010            2054      1756      18.530773  20.774548  19.675071  0.533972   19.694387 
2011            2054      1756      18.991936  21.295645  19.880631  0.387571   19.871258 
2012            2054      1756      19.252773  21.184065  20.07373   0.416886   20.03992  
2013            2054      1756      16.963354  19.086645  17.865853  0.401306   17.887872 
2014            2054      1756      19.409807  22.246935  21.044968  0.581968   21.209855 
2015            2054      1756      18.448     21.085032  19.917544  0.623822   19.997597 
2016            2054      1756      17.451645  20.283323  19.022485  0.628793   19.105452 
2017            2054      1756      18.973806  21.896807  20.59692   0.596412   20.761984 
2018            2054      1756      18.852064  21.531612  20.281368  0.656427   20.309838 
2019            2054      1756      19.797871  22.545774  21.364454  0.7211     21.394919 
2020            2054      1756      17.053226  19.322033  18.414344  0.487748   18.46379  
2021            2054      1756      17.805902  20.542645  19.139425  0.728645   19.065307 
2022            2054      1756      18.089355  20.858     19.51014   0.70945    19.476597 
2023            2054      1756      17.523031  19.838676  18.911614  0.58985    18.977645