I am unaware of any population study of this.
Safe drinking limits for men 21-60 are no more than 2 standard drinks per day (12 oz. Beer, 5 oz. Wine, 1 1/2 oz. 80 proof spirits), and no more than 4 drinks on one occasion. Amounts over that are associated with a number of health and behavioral issues, including increased hypertension and liver problems. For women and men over 60, 1 drink/day.