Statement:
An average person in Serbia drinks more alcohol than in Costa Rica

In the Alcohol average daily consumption rating Serbia holds position #52 ²⁰¹⁶ out of 189 and Costa Rica is #105 out of 189 ²⁰¹⁶.
Position of Serbia is worse than position of Costa Rica.
Both countries holds average positions in the "Alcohol average daily consumption" rating. So Both sexes is an average for both Serbia and Costa Rica, 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.

   Costa Rica	'Both sexes' value is	28.1
   Serbia	'Both sexes' value is	39.9