How many years of comparable data are there for Chad and Zambia?

51 years are reported by both, from 1970 to 2020.

Where does this data come from?

UNESCO Institute for Statistics, published as Official entrance age to upper secondary education (years). Statizoid refreshes it automatically from the source and publishes the full history for both places.

Chad vs Zambia: Official entrance age to upper secondary education

Chad

16 years

in 2020

Zambia

16 years

in 2020

Chad rank

12th

Zambia rank

12th

Official entrance age to upper secondary education over time

Chad
Zambia

How they compare

Chad currently reports 16 years against 16 years in Zambia, a difference of 0 years.

Across all 51 years both countries report, Zambia has been ahead every year.

Chad ranks 12th and Zambia ranks 12th of 209 countries.

Zambia has averaged higher in every one of the 6 decades both report.

Head to head by decade

Decade	Chad	Zambia	Difference	Ahead
1970s	16 years	17 years	1 years	Zambia
1980s	16 years	16.5 years	0.5 years	Zambia
1990s	16 years	16 years	0 years	—
2000s	16 years	16 years	0 years	—
2010s	16 years	16 years	0 years	—
2020s	16 years	16 years	0 years	—

Averages of every year both report within each decade.

Frequently asked questions

Which has higher official entrance age to upper secondary education, Chad or Zambia?: Chad, at 16 years against 16 years in Zambia as of 2020.
What is the difference in official entrance age to upper secondary education between Chad and Zambia?: 0 years, with Chad ahead.
How many years of comparable data are there for Chad and Zambia?: 51 years are reported by both, from 1970 to 2020.
How do Chad and Zambia rank globally for official entrance age to upper secondary education?: Chad ranks 12th and Zambia ranks 12th of 209 countries.
Where does this data come from?: UNESCO Institute for Statistics, published as Official entrance age to upper secondary education (years). Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Chad vs Zambia: Official entrance age to upper secondary education. Statizoid, drawing on UNESCO Institute for Statistics. Retrieved 01 September 2026, from https://education.statizoid.com/compare/official-entrance-age-to-upper-secondary-education-years/chad/zambia/

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About this data

Indicator: Official entrance age to upper secondary education (years)
Unit: years
Source: UNESCO Institute for Statistics
Licence: CC BY 4.0 (World Bank Open Data)
Coverage: 209 places, 10,366 data points, 1970–2020
Last refreshed: 21 August 2026

Age at which students would enter upper secondary education, assuming they had started at the official entrance age for the lowest level of education, had studied full-time throughout and had progressed through the system without repeating or skipping a grade.