Title is incorrect. Should be 15 drinks per week, not per day.
Seems a little misleading, as the population of drinkers is only 70% of the actual population.
We certainly don't claim to apply the rule correctly all the time. We are, however, happy to be corrected. The best way to complain about a title on HN is to suggest a better one.
The top 10 percent of American drinkers - 24 million adults over age 18 - consume, on average, 74 alcoholic drinks per week.
Title at the time of this comment:
Top 10% of American drinkers consume, on average, 74 alcoholic drinks per week