Sao Tome and Principe vs Viet Nam: Theoretical duration of upper secondary education
Sao Tome and Principe
3 years
in 2025
Viet Nam
3 years
in 2025
Sao Tome and Principe rank
52nd
Viet Nam rank
52nd
Theoretical duration of upper secondary education over time
- Sao Tome and Principe
- Viet Nam
How they compare
Sao Tome and Principe currently reports 3 years against 3 years in Viet Nam, a difference of 0 years.
Across all 56 years both countries report, Viet Nam has been ahead every year.
Sao Tome and Principe ranks 52nd and Viet Nam ranks 52nd of 221 countries.
Viet Nam has averaged higher in every one of the 6 decades both report.
Head to head by decade
| Decade | Sao Tome and Principe | Viet Nam | Difference | Ahead |
|---|---|---|---|---|
| 1970s | 3 years | 3 years | 0 years | — |
| 1980s | 2.8 years | 3 years | 0.2 years | Viet Nam |
| 1990s | 2.1 years | 3 years | 0.9 years | Viet Nam |
| 2000s | 2.6 years | 3 years | 0.4 years | Viet Nam |
| 2010s | 2.9 years | 3 years | 0.1 years | Viet Nam |
| 2020s | 3 years | 3 years | 0 years | — |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher theoretical duration of upper secondary education, Sao Tome and Principe or Viet Nam?
- Sao Tome and Principe, at 3 years against 3 years in Viet Nam as of 2025.
- What is the difference in theoretical duration of upper secondary education between Sao Tome and Principe and Viet Nam?
- 0 years, with Sao Tome and Principe ahead.
- How many years of comparable data are there for Sao Tome and Principe and Viet Nam?
- 56 years are reported by both, from 1970 to 2025.
- How do Sao Tome and Principe and Viet Nam rank globally for theoretical duration of upper secondary education?
- Sao Tome and Principe ranks 52nd and Viet Nam ranks 52nd of 221 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