Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1380      1279      28.6443    29.331699  28.989591  0.141402   29.0186   
2008            1380      1279      27.380133  27.896767  27.713707  0.112168   27.738934 
2009            1380      1279      27.937267  28.8029    28.145422  0.201206   28.046267 
2010            1380      1279      28.732834  29.381001  28.896978  0.120451   28.851233 
2011            1380      1279      28.263866  28.817966  28.425808  0.113183   28.399166 
2012            1380      1279      28.2565    28.851299  28.508414  0.147774   28.494967 
2013            1380      1279      28.868166  29.2829    29.075057  0.095249   29.0746   
2014            1380      1279      28.321301  28.7607    28.461826  0.101393   28.416834 
2015            1380      1279      28.324867  28.7834    28.511991  0.104572   28.498533 
2016            1380      1279      29.5418    30.023134  29.79091   0.100787   29.8064   
2017            1380      1279      27.554733  28.0784    27.779404  0.122548   27.745033 
2018            1380      1279      28.927433  29.297234  29.064557  0.09633    29.034599 
2019            1380      1279      29.494967  29.934067  29.722502  0.087011   29.732733 
2020            1380      1279      28.484501  28.949066  28.645318  0.103659   28.613167 
2021            1380      1279      28.333633  28.671566  28.481253  0.083538   28.4718   
2022            1380      1279      28.965633  29.500999  29.227293  0.120759   29.247499 
2023            1380      1279      29.743366  30.313534  29.967694  0.125524   29.9524