Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            300       271       13.644693  13.863693  13.796114  0.050871   13.806871 
2008            300       271       13.369453  13.433413  13.39834   0.017188   13.396817 
2009            300       271       13.174376  13.235595  13.207014  0.011699   13.206986 
2010            300       271       13.493277  13.642006  13.583967  0.043689   13.586205 
2011            300       271       13.532635  13.775135  13.685264  0.057936   13.68278  
2012            300       271       15.02985   15.11941   15.090561  0.018116   15.093213 
2013            300       271       13.486888  13.532269  13.515311  0.011554   13.514696 
2014            300       271       13.111222  13.317088  13.258586  0.039508   13.27     
2015            300       271       13.631184  13.852496  13.779921  0.053512   13.793014 
2016            300       271       14.425328  14.544685  14.502234  0.026824   14.504869 
2017            300       271       13.987551  14.217923  14.096799  0.067788   14.075608 
2018            300       271       13.693316  13.812565  13.766578  0.020472   13.769376 
2019            300       271       13.892299  14.022394  13.981444  0.025162   13.98406  
2020            300       271       14.420041  14.522336  14.486101  0.019442   14.487166 
2021            300       271       14.232677  14.325424  14.282459  0.024742   14.285295 
2022            300       271       13.855969  13.99742   13.932797  0.028296   13.935712 
2023            300       271       14.347642  14.411518  14.38768   0.011822   14.388085