Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            560       525       27.842899  28.322634  28.161309  0.126127   28.218599 
2008            560       525       28.529234  29.137501  28.920879  0.177799   28.9692   
2009            560       525       28.184732  28.780634  28.565851  0.161871   28.645367 
2010            560       525       28.988266  29.578934  29.409522  0.168321   29.4848   
2011            560       525       28.3312    29.0452    28.773288  0.184582   28.844534 
2012            560       525       28.939066  29.1157    29.055552  0.040283   29.070366 
2013            560       525       28.291334  29.040966  28.731637  0.220381   28.7572   
2014            560       525       27.895134  28.0385    27.964912  0.024111   27.964733 
2015            560       525       29.0627    29.370634  29.238608  0.075582   29.248167 
2016            560       525       28.470766  28.908833  28.726669  0.095168   28.764967 
2017            560       525       28.817333  29.094433  28.971018  0.069214   28.978968 
2018            560       525       28.094267  28.609734  28.349534  0.129319   28.406033 
2019            560       525       29.277866  29.590799  29.495399  0.071201   29.512533 
2020            560       525       28.6458    29.037466  28.855321  0.119882   28.8641   
2021            560       525       28.783833  29.449234  29.250053  0.170561   29.3279   
2022            560       525       28.470867  28.863466  28.694024  0.108432   28.726334 
2023            560       525       29.1087    30.019066  29.665347  0.22223    29.698467