Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            289       144       18.504     19.185766  18.908932  0.16754    18.94495  
2008            289       144       16.577133  17.381134  17.048968  0.197797   17.08915  
2009            289       144       18.9233    19.575634  19.31188   0.164018   19.337867 
2010            289       144       18.695866  19.176834  18.972221  0.126863   18.97375  
2011            289       144       17.269766  18.069468  17.73028   0.198133   17.762951 
2012            289       144       16.203766  17.205366  16.79516   0.247122   16.8447   
2013            289       144       17.407566  18.266333  17.909641  0.216146   17.934817 
2014            289       144       16.916666  17.6089    17.313813  0.1838     17.311884 
2015            289       144       19.1537    19.791201  19.5078    0.176264   19.499367 
2016            289       144       17.726933  18.462233  18.117555  0.200683   18.099584 
2017            289       144       16.9275    17.722099  17.369674  0.21191    17.393816 
2018            289       144       17.9021    18.623333  18.314503  0.190369   18.328783 
2019            289       144       17.504366  18.229866  17.922219  0.184553   17.92975  
2020            289       144       19.6936    20.266834  20.007746  0.158712   19.997001 
2021            289       144       15.180634  16.1425    15.774803  0.256401   15.806017 
2022            289       144       17.450689  18.302965  17.950778  0.230234   17.962569 
2023            289       144       16.539766  17.5744    17.171237  0.274148   17.199617