While I supose that is mathematically possible, it's also mathematically possible that pianos may one day rain from the skies. My point is: there may be a few addicts out there who have never relapsed, but they are very few and very far between. Just about every addict - at one time or another - has a relapse. It usually happens in the first five years of recovery.
Actually all three of the sponsors I've had were/are non-relapsers. My current sponsor has 29 years clean/sober.
That's pretty good averages in a small town of 3000 with a small AA group.