Suggestion: Add Rarity Index to the Collection Spreadsheet

I know it's a case of "where do we stop?" with the Export option, but I would personally like to see an additional column in the spreadsheet to indicate the Rarity Index of the coin (after 'Year'). Thanks.

The rarity index is useless information though. Since it just tells you how many members of this site own the coin, it's not going to tell you how rare a coin really is, and using it when selling coins is just misleading.