Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            435       393       14.1315    14.6222    14.437294  0.165658   14.4964   
2008            435       393       12.569     13.082434  12.857241  0.127623   12.86     
2009            435       393       14.9363    15.295934  15.169236  0.096945   15.2079   
2010            435       393       13.152833  13.682167  13.425233  0.12413    13.428233 
2011            435       393       13.063766  13.894267  13.47709   0.189613   13.465366 
2012            435       393       14.314867  14.780666  14.600125  0.120153   14.630267 
2013            435       393       16.0277    16.514799  16.343633  0.095355   16.356434 
2014            435       393       14.403234  15.115233  14.83346   0.165502   14.846567 
2015            435       393       14.306167  14.721066  14.561656  0.073159   14.576266 
2016            435       393       14.347767  14.721434  14.586656  0.077319   14.587167 
2017            435       393       13.746567  14.3567    14.172674  0.131881   14.200533 
2018            435       393       14.2881    14.610133  14.512259  0.071042   14.5266   
2019            435       393       15.813833  16.1357    16.052847  0.060399   16.061501 
2020            435       393       15.8672    17.382601  16.752697  0.346412   16.815901 
2021            435       393       14.221066  16.063566  15.191766  0.424629   15.207933 
2022            435       393       14.200833  14.4564    14.363864  0.052482   14.369866 
2023            435       393       16.222366  17.946066  17.168464  0.420745   17.201733