Three year olds aren't crushing shots every night, even then. That number was per person in the US at the time. You could probably safely double that number. Four pints per night is putting in work.
Thank you! I did not have the citation for the actual number of drinkers and non-drinkers, so I just included the info as I found it. Interpreting the data, we can see that those that drank did so heavily, though other commenters indicate that it may be similar to current alcohol abuse patterns as I elude to in my last sentence.
