100% seems to be the consensus. Glad to see that.
If there is some "legal" or "practical" (based on policy, checking algoriths, etc.) minimum, I've really never heard of it. Integrity is the most important--and most commonly shared--character trait of the truly successful. Without Integrity, one's Vision is faulty, so one's goals are misguided, and even "success" in the venture fails to enrich life and increase peace.