Statement:
An average person in Yemen drinks less alcohol than in Tonga

In the Alcohol average daily consumption rating Yemen holds position #129 2016 out of 189 and Tonga is #121 out of 189 2016.
Position of Yemen is better than position of Tonga.
Both countries holds average positions in the "Alcohol average daily consumption" rating. So Both sexes is an average for both Yemen and Tonga, 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
    Yemen 'Both sexes' value is 20.3