Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            710       666       14.7267    15.186399  14.9753    0.07896    14.966116 
2008            710       666       14.717633  15.226867  15.050813  0.08794    15.054934 
2009            710       666       15.016367  15.789866  15.390544  0.169167   15.390034 
2010            710       666       15.291266  15.7665    15.56789   0.086334   15.578233 
2011            710       666       16.7348    17.030167  16.881277  0.05149    16.881817 
2012            710       666       16.0159    16.679899  16.338716  0.126446   16.328217 
2013            710       666       15.084133  15.492367  15.318859  0.072618   15.31285  
2014            710       666       15.3929    15.9911    15.713306  0.095846   15.717516 
2015            710       666       16.0791    16.675467  16.470444  0.106806   16.485883 
2016            710       666       16.066933  16.655767  16.348043  0.107342   16.355617 
2017            710       666       14.8782    15.443399  15.223423  0.121693   15.241683 
2018            710       666       16.512833  17.271099  16.902607  0.150968   16.89275  
2019            710       666       15.405867  15.847633  15.597586  0.091021   15.599083 
2020            710       666       14.909866  15.468467  15.220581  0.087094   15.236733 
2021            710       666       16.951099  17.373301  17.154444  0.103381   17.1487   
2022            710       666       15.9385    16.512033  16.224448  0.114049   16.222417 
2023            710       666       16.639933  17.023533  16.84766   0.073543   16.850266