Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            96        90        17.314571  17.548464  17.366218  0.045754   17.35225  
2008            96        90        19.326862  19.898897  19.591631  0.122511   19.614224 
2009            96        90        16.243071  16.425035  16.353921  0.053035   16.365804 
2010            96        90        14.872     15.410964  15.076221  0.117501   15.073429 
2011            96        90        16.982571  17.210178  17.053379  0.053086   17.042536 
2012            96        90        19.07807   19.508966  19.239557  0.088887   19.227172 
2013            96        90        18.791428  19.099501  18.961726  0.072211   18.982143 
2014            96        90        18.42675   18.663572  18.587329  0.060969   18.618446 
2015            96        90        16.270607  16.699358  16.394444  0.092552   16.382196 
2016            96        90        16.591724  16.949345  16.671628  0.080571   16.643311 
2017            96        90        19.6875    19.874035  19.743942  0.035774   19.740214 
2018            96        90        19.852249  20.11482   19.905169  0.059998   19.881286 
2019            96        90        19.163214  19.415215  19.254491  0.050247   19.253821 
2020            96        90        18.863344  19.139034  18.916924  0.057652   18.895863 
2021            96        90        18.79077   19.385654  18.970071  0.119253   18.958635 
2022            96        90        17.676178  17.793964  17.750298  0.031918   17.754589 
2023            96        90        20.386499  20.775     20.602399  0.09774    20.61659