Hello, I have see question marks as years in many banknote pages and I don't feel they have a place in any year line. Could someone please tell me why there are question marks being used as years with no other info that would be great. This is an example that I would like the question marks taken out of the first two year slots. I cannot modify them out of the year slots as when I hit modify it says I haven't made any changes so my request doesn't go through. If a catalog referee could take out these question marks that would be great, thanks!