Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            126       60        18.587467  18.849199  18.769267  0.047351   18.773633 
2008            126       60        18.770332  19.0021    18.924814  0.043486   18.929234 
2009            126       60        18.617134  18.745832  18.711447  0.031079   18.719067 
2010            126       60        18.7962    18.9711    18.931045  0.038254   18.944683 
2011            126       60        20.791965  20.992517  20.938511  0.039079   20.945931 
2012            126       60        21.3002    21.401567  21.368856  0.018231   21.373466 
2013            126       60        17.659201  18.1371    17.985481  0.094733   18.004766 
2014            126       60        17.9823    18.368334  18.228526  0.086414   18.233634 
2015            126       60        19.289499  19.8083    19.644158  0.104654   19.661901 
2016            126       60        19.3426    19.669899  19.580229  0.070867   19.593783 
2017            126       60        21.168066  21.456133  21.377382  0.062688   21.401099 
2018            126       60        17.678467  18.162533  17.993859  0.100628   18.019383 
2019            126       60        18.957466  19.404766  19.253281  0.088417   19.266833 
2020            126       60        20.1707    20.540768  20.420768  0.0847     20.434833 
2021            126       60        18.9457    19.1127    19.044041  0.0505     19.049933 
2022            126       60        20.068933  20.395332  20.292868  0.069445   20.313017 
2023            126       60        20.495104  20.714966  20.670069  0.045071   20.684017