In the analytics DB there is an activity table that contains share info.
More general info can be found here: Analytics DB Data Model
But here are the object types you are asking about:
And the month to month can be found in:
depending on if you want it user by user or aggregated.
Awesome - thanks Josh. That'll get me pointed in the right direction. On a related note, is there an updated Analytics Guide newer than this one: The specified item was not found..
Oops - BO is NOT in our environment, so No. The Analytics Data Model doc will be really helpful, though.
Thanks again. -S