Statement:
An average person in Iran drinks more alcohol than in Tonga

In the Alcohol average daily consumption rating Iran holds position #9 2016 out of 189 and Tonga is #121 out of 189 2016.
Position of Iran is worse than position of Tonga.
Iran is leader of the "Alcohol average daily consumption" rating. So people in Iran are more likely to experience problems related to the consumption of alcohol in social, healthcare, and economical areas, compared to Tonga

Referencies:

  1. Alcohol average daily consumption 2016 by WHO
    The countries in the rating sorted by 'Both sexes' in descending order.
    Iran 'Both sexes' value is 61.4
    Tonga 'Both sexes' value is 23.1