Tajikistan at the bottom of EF EPI ranking

The EF EPI tenth edition was calculated using test data from 2.2 million test takers over 18 in 100 countries and regions.  Proficiency bands: very high; high; moderate; low; and very low.  

The median age of test takers was 26.

Median age is the age that divides a population into two numerically equally sized groups - that is, half the people are younger than this age and half are older.  It is a single index that summarizes the age distribution of a population.

Tajikistan ranks in the last 100th place