Year            Count     Valid     Min        Max        Mean       Stdev      Median
2007            560       525       26.781452  27.313257  27.030775  0.111576   27.030064 
2008            560       525       24.805613  25.463676  25.081148  0.161861   25.043194 
2009            560       525       26.038967  26.595581  26.297469  0.147797   26.286903 
2010            560       525       26.239225  26.757097  26.465693  0.102114   26.452742 
2011            560       525       25.704193  26.170612  25.889091  0.110049   25.861967 
2012            560       525       25.757193  26.257193  26.007626  0.15555    26.031322 
2013            560       525       26.106161  26.633129  26.370672  0.110881   26.35042  
2014            560       525       26.162613  26.674129  26.362994  0.127785   26.349903 
2015            560       525       25.734646  26.587677  26.139049  0.193646   26.082355 
2016            560       525       26.843645  27.309517  27.001538  0.106251   26.992001 
2017            560       525       26.564936  26.986742  26.742081  0.116383   26.714483 
2018            560       525       26.250193  26.692678  26.45387   0.092956   26.463871 
2019            560       525       26.324194  26.870646  26.563344  0.137498   26.570097 
2020            560       525       26.058065  26.235291  26.15775   0.034356   26.15271  
2021            560       525       26.458323  26.838871  26.651909  0.09115    26.616646 
2022            560       525       25.934839  26.430548  26.153186  0.114543   26.139904 
2023            560       525       26.363291  26.817709  26.552312  0.141283   26.515903