This sub-tab contains a summary of the purchasing history.
The list has one line per year. It is populated with Purchase Requests (PRs) and POs.
It cannot be modified.    

• Year: The calendar year to which the total refers.
• Total amount: Amount of the purchase request lines (PRLs) or order lines of this item for the year. Only closed PRs and POs are taken into account.
• No. of purchase requests: Number of PR lines referring to this item over the year.
• No. of POs: Number of order lines referring to this item over the year.