How many years of comparable data are there for Mali and Sao Tome and Principe?

56 years are reported by both, from 1970 to 2025.

Where does this data come from?

UNESCO Institute for Statistics (2026) – with minor processing by Our World in Data, published as Duration of pre-primary education. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Mali vs Sao Tome and Principe: Duration of pre-primary education

Mali

3 years

in 2025

Sao Tome and Principe

3 years

in 2025

Mali rank

27th

Sao Tome and Principe rank

27th

Duration of pre-primary education over time

Mali
Sao Tome and Principe

How they compare

Mali currently reports 3 years against 3 years in Sao Tome and Principe, a difference of 0 years.

The two have swapped places 2 times across 56 shared years of data; in 1970 it was Sao Tome and Principe ahead.

Mali ranks 27th and Sao Tome and Principe ranks 27th of 223 countries.

Across the 6 decades both report, Mali averaged higher in 2 and Sao Tome and Principe in 3.

Head to head by decade

Decade	Mali	Sao Tome and Principe	Difference	Ahead
1970s	2 years	4 years	2 years	Sao Tome and Principe
1980s	2 years	4 years	2 years	Sao Tome and Principe
1990s	3.2 years	4 years	0.8 years	Sao Tome and Principe
2000s	4 years	3.6 years	0.4 years	Mali
2010s	3.7 years	3 years	0.7 years	Mali
2020s	3 years	3 years	0 years	—

Averages of every year both report within each decade.

Frequently asked questions

Which has higher duration of pre-primary education, Mali or Sao Tome and Principe?: Mali, at 3 years against 3 years in Sao Tome and Principe as of 2025.
What is the difference in duration of pre-primary education between Mali and Sao Tome and Principe?: 0 years, with Mali ahead.
How many years of comparable data are there for Mali and Sao Tome and Principe?: 56 years are reported by both, from 1970 to 2025.
How do Mali and Sao Tome and Principe rank globally for duration of pre-primary education?: Mali ranks 27th and Sao Tome and Principe ranks 27th of 223 countries.
Where does this data come from?: UNESCO Institute for Statistics (2026) – with minor processing by Our World in Data, published as Duration of pre-primary education. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Mali vs Sao Tome and Principe: Duration of pre-primary education. Statizoid, drawing on UNESCO Institute for Statistics (2026) – with minor processing by Our World in Data. Retrieved 03 September 2026, from https://education.statizoid.com/compare/duration-of-pre-primary-education/mali/sao-tome-and-principe/

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About this data

Indicator: Duration of pre-primary education
Unit: years
Source: UNESCO Institute for Statistics (2026) – with minor processing by Our World in Data
Licence: CC BY 4.0 (Our World in Data)
Coverage: 223 places, 12,020 data points, 1970–2025
Last refreshed: 28 August 2026

Average number of years that a child is expected to spend in pre-primary education, defined by country's official educational regulations or laws.