Estonia vs Tonga: Theoretical duration of upper secondary education
Estonia
3 years
in 2025
Tonga
3 years
in 2025
Estonia rank
52nd
Tonga rank
52nd
Theoretical duration of upper secondary education over time
- Estonia
- Tonga
How they compare
Estonia currently reports 3 years against 3 years in Tonga, a difference of 0 years.
The two have swapped places 3 times across 56 shared years of data; in 1970 it was Estonia ahead.
Estonia ranks 52nd and Tonga ranks 52nd of 215 countries.
Estonia has averaged higher in every one of the 6 decades both report.
Head to head by decade
| Decade | Estonia | Tonga | Difference | Ahead |
|---|---|---|---|---|
| 1970s | 3 years | 2 years | 1 years | Estonia |
| 1980s | 3 years | 2.6 years | 0.4 years | Estonia |
| 1990s | 3 years | 2.8 years | 0.2 years | Estonia |
| 2000s | 3 years | 2 years | 1 years | Estonia |
| 2010s | 3 years | 2 years | 1 years | Estonia |
| 2020s | 3 years | 2.5 years | 0.5 years | Estonia |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher theoretical duration of upper secondary education, Estonia or Tonga?
- Estonia, at 3 years against 3 years in Tonga as of 2025.
- What is the difference in theoretical duration of upper secondary education between Estonia and Tonga?
- 0 years, with Estonia ahead.
- How many years of comparable data are there for Estonia and Tonga?
- 56 years are reported by both, from 1970 to 2025.
- How do Estonia and Tonga rank globally for theoretical duration of upper secondary education?
- Estonia ranks 52nd and Tonga ranks 52nd of 215 countries.
- Where does this data come from?
- UNESCO Institute for Statistics, published as Theoretical duration of upper secondary education (years). Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
February 2026 Data Release