Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            96        90        19.643644  19.740355  19.690119  0.023421   19.687694 
2008            96        90        19.77084   20.064096  19.945261  0.072864   19.967919 
2009            96        90        18.696774  18.774065  18.731748  0.015011   18.730178 
2010            96        90        15.478419  15.606709  15.517491  0.026183   15.514822 
2011            96        90        20.609646  20.827967  20.742267  0.051409   20.747065 
2012            96        90        22.762646  22.841484  22.815459  0.018111   22.817871 
2013            96        90        17.894096  18.148838  17.971116  0.049942   17.965081 
2014            96        90        20.144064  20.609194  20.345027  0.096608   20.36079  
2015            96        90        21.481194  21.776001  21.656291  0.082248   21.664968 
2016            96        90        20.00658   20.202871  20.073633  0.040559   20.064791 
2017            96        90        20.638903  20.728065  20.673772  0.02305    20.679113 
2018            96        90        20.432291  20.625452  20.518937  0.056874   20.505355 
2019            96        90        21.473969  21.635775  21.554707  0.041904   21.561629 
2020            96        90        21.790903  22.051678  21.914896  0.06663    21.924065 
2021            96        90        21.233032  21.600935  21.43983   0.094202   21.451516 
2022            96        90        21.278225  21.516258  21.35636   0.046116   21.356613 
2023            96        90        23.087872  23.396322  23.214462  0.063436   23.219548