Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            710       666       12.540934  13.3405    12.967635  0.184026   12.9383   
2008            710       666       13.430034  13.997434  13.800293  0.092467   13.818217 
2009            710       666       12.299666  12.950967  12.608754  0.128801   12.584183 
2010            710       666       13.639334  14.415934  14.083434  0.165959   14.0942   
2011            710       666       13.077     13.6475    13.422496  0.106389   13.445917 
2012            710       666       14.369534  15.2915    14.908512  0.233542   14.94665  
2013            710       666       13.449933  13.964733  13.712865  0.091595   13.700683 
2014            710       666       13.4275    13.9144    13.675683  0.095444   13.6826   
2015            710       666       11.897166  12.582967  12.243963  0.153445   12.2631   
2016            710       666       13.220233  13.6567    13.420347  0.099456   13.422367 
2017            710       666       12.933167  13.2654    13.121968  0.089725   13.1376   
2018            710       666       12.932134  13.421367  13.179352  0.078362   13.189483 
2019            710       666       12.432034  12.864067  12.689028  0.088621   12.698133 
2020            710       666       13.745234  14.2777    14.04238   0.08907    14.043467 
2021            710       666       14.218133  14.530434  14.3763    0.084736   14.387217 
2022            710       666       14.032267  14.464666  14.281267  0.096851   14.300983 
2023            710       666       14.0947    14.541667  14.245908  0.096868   14.225433