There is only 1 AA success statistic that I have kept up with, and it has remained at 100% for almost 28 years (my AA birthday is September 22).
How to accurately calculate AA successes and failures is itself a matter of considerable debate.
Has AA failed when a court-required attendee completes his or her 30 or 60 day sentence and goes back out and dies drunk?
Has AA failed when someone attends one meeting, never comes back and dies drunk?
Has SMART failed when someone attends one meeting, never comes back and dies drunk?
Do SSRI anti-depressants fail when someone takes them for 1 or 2 days, then quits and commits suicide?
I don't join the debating society on this issue or many others involving AA for that matter.
God and AA have been the foundations for my sobriety since I was 31 years old.
Given my horrible drinking history, remaining sober since my first treatment and AA meeting has been miraculous.
Thus far, that would go in the "win column" from my perspective.
And I attribute my sobriety and recovery completely to God and AA, in that order.