Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1706      1017      13.906775  15.264709  14.587228  0.31521    14.573677 
2008            1706      1017      13.616968  15.06771   14.341373  0.34096    14.324677 
2009            1706      1017      14.598419  15.539839  15.124814  0.201324   15.143452 
2010            1706      1017      12.398355  13.523742  12.968411  0.261776   12.954935 
2011            1706      1017      11.902967  12.895516  12.42854   0.21973    12.427645 
2012            1706      1017      15.365581  15.885871  15.662583  0.112708   15.683032 
2013            1706      1017      14.870193  16.129677  15.485987  0.288471   15.457258 
2014            1706      1017      10.823387  12.087516  11.477252  0.273832   11.483548 
2015            1706      1017      13.322355  14.911419  14.086911  0.383479   14.043451 
2016            1706      1017      12.573194  13.659742  13.122919  0.221276   13.146968 
2017            1706      1017      15.531871  16.586033  16.070439  0.241402   16.062485 
2018            1706      1017      10.144645  11.704258  10.936064  0.361634   10.918549 
2019            1706      1017      13.301387  14.237064  13.780323  0.20414    13.791129 
2020            1706      1017      14.695709  15.245838  14.99183   0.116611   14.997    
2021            1706      1017      12.693161  13.393097  13.040546  0.151387   13.018387 
2022            1706      1017      13.224032  14.107162  13.599773  0.182462   13.564613 
2023            1706      1017      14.440613  15.493548  14.935488  0.214972   14.908194