Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            274       177       21.906076  22.41798   22.179851  0.128614   22.190462 
2008            274       177       20.622219  21.263     20.947748  0.159092   20.943666 
2009            274       177       20.65593   21.446983  21.037096  0.196288   21.018654 
2010            274       177       20.494267  21.010647  20.741875  0.129283   20.734863 
2011            274       177       21.017189  21.488516  21.239006  0.1186     21.22827  
2012            274       177       21.804522  22.257807  22.024942  0.116003   22.018768 
2013            274       177       21.199049  21.686996  21.435379  0.11798    21.430618 
2014            274       177       20.989822  21.610697  21.297036  0.149358   21.290995 
2015            274       177       21.402811  21.85301   21.62058   0.11087    21.610704 
2016            274       177       22.043837  22.390249  22.20442   0.083982   22.202423 
2017            274       177       22.200964  22.430302  22.312373  0.051257   22.312925 
2018            274       177       21.143044  21.42737   21.289577  0.06497    21.28824  
2019            274       177       21.815868  22.067184  21.920149  0.047026   21.915882 
2020            274       177       22.3347    22.618828  22.498923  0.067164   22.513248 
2021            274       177       21.799559  22.012865  21.955841  0.06894    21.992535 
2022            274       177       21.983591  22.253143  22.124577  0.061841   22.132704 
2023            274       177       22.281349  22.663832  22.524772  0.108475   22.563881