Statement:
An average person in Tonga drinks less alcohol than in The USA

In the Alcohol average daily consumption rating Tonga holds position #121 2016 out of 189 and The USA is #100 out of 189 2016.
Position of Tonga is better than position of The USA.
Both countries holds average positions in the "Alcohol average daily consumption" rating. So Both sexes is an average for both Tonga and The USA, compared to most countries of the World.

Referencies:

  1. Alcohol average daily consumption 2016 by WHO
    The countries in the rating sorted by 'Both sexes' in descending order.
    Tonga 'Both sexes' value is 23.1
    The USA 'Both sexes' value is 29.6