Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            337       298       15.626     16.292572  15.98391   0.138542   15.975732 
2008            337       298       16.71162   17.314173  17.043467  0.119967   17.048086 
2009            337       298       15.878928  16.607107  16.28055   0.167156   16.276303 
2010            337       298       14.403071  15.03775   14.755437  0.122355   14.758857 
2011            337       298       14.227036  14.837893  14.611572  0.139977   14.624125 
2012            337       298       16.586035  17.025759  16.835956  0.093109   16.84069  
2013            337       298       16.609322  17.328428  16.937464  0.145479   16.922089 
2014            337       298       14.987607  15.586286  15.330993  0.121305   15.331125 
2015            337       298       15.488571  16.637358  16.074364  0.258289   16.074964 
2016            337       298       15.405138  16.318378  15.854355  0.181933   15.850862 
2017            337       298       18.173107  18.893106  18.449789  0.144011   18.433714 
2018            337       298       18.337357  19.025536  18.764948  0.163381   18.797589 
2019            337       298       16.683643  17.36725   17.022682  0.140561   17.01016  
2020            337       298       15.552137  16.619516  16.053299  0.218548   16.031431 
2021            337       298       14.751192  15.663961  15.257307  0.194264   15.248212 
2022            337       298       14.526678  15.6615    15.139052  0.231131   15.127214 
2023            337       298       17.552893  18.426821  18.067959  0.197279   18.090571