Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            560       525       29.909258  30.403355  30.250991  0.125531   30.303806 
2008            560       525       28.297096  29.047194  28.826073  0.18141    28.852354 
2009            560       525       29.397968  30.076097  29.859645  0.184489   29.944098 
2010            560       525       29.914     30.808453  30.5633    0.237974   30.662935 
2011            560       525       29.670517  30.651968  30.357039  0.269507   30.470259 
2012            560       525       29.356548  30.093613  29.872294  0.216056   29.972902 
2013            560       525       28.722322  29.238581  29.003209  0.117736   29.043774 
2014            560       525       28.591484  29.299097  28.986433  0.184484   29.052    
2015            560       525       29.114935  29.645161  29.442837  0.119877   29.477549 
2016            560       525       29.634968  29.993032  29.86402   0.089104   29.860323 
2017            560       525       29.210032  29.796904  29.495321  0.138629   29.525839 
2018            560       525       28.64584   29.136097  28.881512  0.104308   28.89571  
2019            560       525       29.556257  30.134386  29.860699  0.149265   29.922291 
2020            560       525       29.750517  30.477741  30.235331  0.182692   30.278645 
2021            560       525       30.368355  30.853516  30.68038   0.120908   30.728001 
2022            560       525       29.755646  30.03229   29.914067  0.082701   29.950678 
2023            560       525       29.462677  30.601257  30.165317  0.305039   30.152098