Powerpivot>Reporting Services Report > Data Refresh new records only?

[visionnz]

Hi thier,
Is it possible to only refresh and import new records from a power pivot> reporting services report connection rather than re-importing the whole data-set?

E.G I have a years worth of data with over a million rows increasing by thousands per day. When I refresh the report (a Daily activity) it reimports all records again? How do you retain the older records and simple import the new records?

Any help and support would be appreciated