Sao Tome and Principe vs Sudan: Theoretical duration of lower secondary education
Sao Tome and Principe
3 years
in 2025
Sudan
3 years
in 2025
Sao Tome and Principe rank
91st
Sudan rank
91st
Theoretical duration of lower secondary education over time
- Sao Tome and Principe
- Sudan
How they compare
Sao Tome and Principe currently reports 3 years against 3 years in Sudan, a difference of 0 years.
The two have swapped places 3 times across 28 shared years of data; in 1998 it was Sao Tome and Principe ahead.
Sao Tome and Principe ranks 91st and Sudan ranks 91st of 221 countries.
Sao Tome and Principe has averaged higher in every one of the 4 decades both report.
Head to head by decade
| Decade | Sao Tome and Principe | Sudan | Difference | Ahead |
|---|---|---|---|---|
| 1990s | 3.5 years | 2 years | 1.5 years | Sao Tome and Principe |
| 2000s | 2.4 years | 2 years | 0.4 years | Sao Tome and Principe |
| 2010s | 3 years | 2 years | 1 years | Sao Tome and Principe |
| 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 lower secondary education, Sao Tome and Principe or Sudan?
- Sao Tome and Principe, at 3 years against 3 years in Sudan as of 2025.
- What is the difference in theoretical duration of lower secondary education between Sao Tome and Principe and Sudan?
- 0 years, with Sao Tome and Principe ahead.
- How many years of comparable data are there for Sao Tome and Principe and Sudan?
- 28 years are reported by both, from 1998 to 2025.
- How do Sao Tome and Principe and Sudan rank globally for theoretical duration of lower secondary education?
- Sao Tome and Principe ranks 91st and Sudan ranks 91st of 221 countries.
- Where does this data come from?
- UNESCO Institute for Statistics, published as Theoretical duration of lower 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