What is the difference in theoretical duration of pre-primary education between American Samoa and Sao Tome and Principe?

0 years, with American Samoa ahead.

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

22 years are reported by both, from 1981 to 2019.

Where does this data come from?

UNESCO Institute for Statistics, published as Theoretical duration of pre-primary education (years). Statizoid refreshes it automatically from the source and publishes the full history for both places.

American Samoa vs Sao Tome and Principe: Theoretical duration of pre-primary education

American Samoa

3 years

in 2019

Sao Tome and Principe

3 years

in 2019

American Samoa rank

21st

Sao Tome and Principe rank

21st

Theoretical duration of pre-primary education over time

American Samoa
Sao Tome and Principe

How they compare

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

Across all 22 years both countries report, Sao Tome and Principe has been ahead every year.

American Samoa ranks 21st and Sao Tome and Principe ranks 21st of 210 countries.

Sao Tome and Principe has averaged higher in every one of the 3 decades both report.

Head to head by decade

Decade	American Samoa	Sao Tome and Principe	Difference	Ahead
1980s	3 years	4 years	1 years	Sao Tome and Principe
1990s	3 years	4 years	1 years	Sao Tome and Principe
2010s	3 years	3 years	0 years	—

Averages of every year both report within each decade.

Frequently asked questions

Which has higher theoretical duration of pre-primary education, American Samoa or Sao Tome and Principe?: American Samoa, at 3 years against 3 years in Sao Tome and Principe as of 2019.
What is the difference in theoretical duration of pre-primary education between American Samoa and Sao Tome and Principe?: 0 years, with American Samoa ahead.
How many years of comparable data are there for American Samoa and Sao Tome and Principe?: 22 years are reported by both, from 1981 to 2019.
How do American Samoa and Sao Tome and Principe rank globally for theoretical duration of pre-primary education?: American Samoa ranks 21st and Sao Tome and Principe ranks 21st of 210 countries.
Where does this data come from?: UNESCO Institute for Statistics, published as Theoretical duration of pre-primary education (years). Statizoid refreshes it automatically from the source and publishes the full history for both places.

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American Samoa vs Sao Tome and Principe: Theoretical duration of pre-primary education. Statizoid, drawing on UNESCO Institute for Statistics. Retrieved 02 September 2026, from https://reference.statizoid.com/compare/theoretical-duration-of-pre-primary-education-years/american-samoa/sao-tome-and-principe/

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About this data

Indicator: Theoretical duration of pre-primary education (years)
Unit: years
Source: UNESCO Institute for Statistics
Licence: CC BY 4.0 (World Bank Open Data)
Coverage: 210 places, 10,271 data points, 1970–2020
Last refreshed: 21 August 2026

Number of grades (years) in pre-primary education.