Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            1281      519       15.393179  17.110321  16.112134  0.367711   16.076822 
2008            1281      519       17.232723  18.211828  17.549414  0.157215   17.555138 
2009            1281      519       16.388071  17.523142  16.870553  0.226089   16.877607 
2010            1281      519       13.460072  14.595322  14.067344  0.251472   14.088322 
2011            1281      519       15.544357  16.548178  15.979917  0.187824   15.987965 
2012            1281      519       17.979862  18.718931  18.316889  0.157265   18.318449 
2013            1281      519       16.659964  17.841143  17.019022  0.22153    16.967072 
2014            1281      519       15.60725   16.628643  16.053073  0.173801   16.051035 
2015            1281      519       15.281214  16.953001  15.93188   0.333499   15.925643 
2016            1281      519       15.558483  16.726242  16.049297  0.272101   16.021103 
2017            1281      519       18.043535  19.102715  18.484854  0.242994   18.455    
2018            1281      519       18.252001  19.897215  18.960344  0.353255   18.964357 
2019            1281      519       16.073393  17.703251  16.617315  0.291526   16.584143 
2020            1281      519       15.320621  16.650208  15.817126  0.294832   15.774517 
2021            1281      519       15.478461  17.13777   16.096774  0.325755   16.074963 
2022            1281      519       14.565893  16.532965  15.276412  0.406525   15.210286 
2023            1281      519       17.562357  18.817465  18.048121  0.219053   18.040928