Tajikistan's persistence to last grade of primary, total (% of cohort) was 98.96% in 2016, the latest year in the World Bank's World Development Indicators. That is down 0.03 percentage points from 98.99% in 2006.
Education · Tajikistan
Tajikistan: Persistence to last grade of primary, total (% of cohort)
Yearly data from 1998 to 2016, from the World Bank.