Kareem,
This is not possible on the on-premise Portal. We have seen customers in the past with on-prem write database queries to the metrics tables of the ssg database for such use, but this was done by the customer on their own, or helped with our Professional Services team.
However, this feature DOES exist in our SaaS Portal, where the Analytics & Business Reports can all be exported.
I hope this helps.
-Alec Daniello
APIM Support