Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            560       525       23.818027  24.09726   23.97531   0.078463   23.977903 
2008            560       525       23.561325  23.849934  23.730492  0.073337   23.747715 
2009            560       525       23.690741  24.001123  23.866687  0.083292   23.866621 
2010            560       525       23.331764  23.55015   23.46433   0.044517   23.478285 
2011            560       525       23.838882  24.154146  24.015594  0.081887   24.020571 
2012            560       525       24.027338  24.300732  24.202608  0.073296   24.235929 
2013            560       525       23.275501  23.567205  23.45459   0.075691   23.469622 
2014            560       525       22.836554  23.115534  23.00494   0.070826   23.034309 
2015            560       525       23.530899  23.83445   23.694164  0.076479   23.699329 
2016            560       525       23.882196  24.197002  24.072112  0.088119   24.10428  
2017            560       525       24.051384  24.343565  24.220886  0.075847   24.249498 
2018            560       525       23.373154  23.704195  23.577264  0.084238   23.61129  
2019            560       525       23.082977  23.485693  23.31568   0.107783   23.34935  
2020            560       525       23.834461  24.060314  23.948833  0.038371   23.948656 
2021            560       525       23.507008  23.776848  23.595456  0.049591   23.592432 
2022            560       525       23.192608  23.50148   23.376711  0.084161   23.404062 
2023            560       525       23.899885  24.119892  24.002027  0.040172   24.006447