Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            560       525       28.256645  28.608967  28.416181  0.065001   28.419033 
2008            560       525       28.450483  29.187613  28.869505  0.203604   28.959064 
2009            560       525       28.027742  28.717386  28.504205  0.172918   28.511806 
2010            560       525       29.662645  29.957064  29.823947  0.088748   29.855129 
2011            560       525       29.432903  30.394484  30.094091  0.239217   30.210001 
2012            560       525       29.338806  29.621387  29.476957  0.076519   29.457193 
2013            560       525       28.557549  28.889612  28.757733  0.063361   28.78129  
2014            560       525       28.499258  29.263968  28.863426  0.169324   28.914709 
2015            560       525       27.476774  28.003225  27.707998  0.098731   27.707483 
2016            560       525       28.610001  29.326097  29.017466  0.170911   29.064161 
2017            560       525       29.797194  30.250742  30.058751  0.121794   30.103838 
2018            560       525       28.008064  28.593225  28.290453  0.12961    28.319967 
2019            560       525       29.002323  29.504999  29.337444  0.12815    29.391645 
2020            560       525       29.002548  29.974743  29.624546  0.236059   29.675484 
2021            560       525       29.286903  30.023678  29.76508   0.20592    29.843128 
2022            560       525       29.155226  30.013388  29.732866  0.208736   29.821032 
2023            560       525       28.907614  30.260839  29.727687  0.361299   29.684162