Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1213      941       14.273323  15.393032  15.051535  0.326209   15.225839 
2008            1213      941       13.930936  14.719161  14.471431  0.213395   14.572064 
2009            1213      941       14.253806  15.41529   14.991297  0.365668   15.083903 
2010            1213      941       13.787903  15.000838  14.487551  0.35467    14.536387 
2011            1213      941       13.713387  14.55529   14.342689  0.218914   14.464581 
2012            1213      941       13.098354  14.536903  13.952127  0.424741   14.049968 
2013            1213      941       14.498161  15.586904  15.280277  0.345564   15.465936 
2014            1213      941       16.474646  17.509226  17.055565  0.286655   17.121323 
2015            1213      941       16.566387  17.619387  17.287264  0.300957   17.443356 
2016            1213      941       14.688548  15.385129  15.151084  0.206046   15.215516 
2017            1213      941       14.801193  15.842355  15.455689  0.318015   15.535387 
2018            1213      941       13.364161  14.839387  14.219246  0.44542    14.262259 
2019            1213      941       14.335838  15.747774  15.24164   0.391079   15.411    
2020            1213      941       17.240032  23.76413   18.991666  0.625553   19.002613 
2021            1213      941       17.221161  19.445709  18.064245  0.27082    18.080032 
2022            1213      941       15.071807  16.328711  15.915327  0.373495   16.026581 
2023            1213      941       17.230549  23.230968  18.903189  0.583834   18.881193