, 17 June 2014 (UTC) 

  
 : I will note that the image is Department of Labor so this is following the cite.   If there is another source or redo extract of this then suggest that it might remove the concern if the map used the convention of shdes of a single color and white for no data  e.g dark green for higher pay, medium for federal level, and light green for lower pay.    16:40