Currently, the year listed when you export your collection is the year from the coin. If the coin is ND, the year cell says Unknown, even though it is known and shown in parentheses on the site. Similarly, non-Julian years are exported as is - which, even though accurately reflects what's on the coin, is rather useless when trying to sort your collection by Julian year or do any sort of date-based pivot charts/tables. Ideally, both the year on the coin and its Julian counterpart should be in the export as separate columns. Any chance this could be implemented?
