Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            817       479       11.997355  12.578161  12.439557  0.118293   12.483742 
2008            817       479       12.277388  12.783936  12.611863  0.12084    12.632613 
2009            817       479       11.810645  12.431291  12.208319  0.141613   12.234129 
2010            817       479       13.00158   13.625161  13.431382  0.147483   13.481    
2011            817       479       13.416806  13.967452  13.833156  0.139805   13.892226 
2012            817       479       11.691129  12.280548  12.014033  0.106268   12.021968 
2013            817       479       13.277355  13.927355  13.728222  0.147816   13.760775 
2014            817       479       14.869064  15.693419  15.413291  0.220083   15.435194 
2015            817       479       13.268678  14.287097  13.891748  0.263157   13.892355 
2016            817       479       12.285097  13.125322  12.787932  0.188984   12.801935 
2017            817       479       12.052838  13.031226  12.712176  0.222582   12.751806 
2018            817       479       12.172516  13.339     12.857375  0.25493    12.873581 
2019            817       479       12.543387  13.183517  13.04838   0.140483   13.112516 
2020            817       479       14.570387  15.906355  15.332815  0.41623    15.462452 
2021            817       479       13.332129  14.768903  14.078453  0.389012   14.174839 
2022            817       479       11.774194  12.906838  12.298538  0.25392    12.261226 
2023            817       479       14.479033  15.455774  15.145697  0.273393   15.263839