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

7 years are reported by both, from 2002 to 2015.

Where does this data come from?

UNESCO Institute for Statistics, published as Repetition rate in lower secondary general education (all grades), both sexes (%). Statizoid refreshes it automatically from the source and publishes the full history for both places.

Chad vs Guinea: Repetition rate in lower secondary general education (all grades)

Chad

19.0%

in 2017

Guinea

19.1%

in 2015

Chad rank

16th

Guinea rank

15th

Repetition rate in lower secondary general education (all grades) over time

Chad
Guinea

How they compare

Guinea currently reports 19.1% against 19.0% in Chad, a difference of 0.1%.

The two have swapped places 2 times across 7 shared years of data; in 2002 it was Chad ahead.

Chad ranks 16th and Guinea ranks 15th of 156 countries.

Chad has averaged higher in every one of the 2 decades both report.

Head to head by decade

Decade	Chad	Guinea	Difference	Ahead
2000s	20.2%	17.4%	2.7%	Chad
2010s	21.7%	21.2%	0.4%	Chad

Averages of every year both report within each decade.

Frequently asked questions

Which has higher repetition rate in lower secondary general education (all grades), Chad or Guinea?: Guinea, at 19.1% against 19.0% in Chad as of 2015.
What is the difference in repetition rate in lower secondary general education (all grades) between Chad and Guinea?: 0.1%, with Guinea ahead.
How many years of comparable data are there for Chad and Guinea?: 7 years are reported by both, from 2002 to 2015.
How do Chad and Guinea rank globally for repetition rate in lower secondary general education (all grades)?: Chad ranks 16th and Guinea ranks 15th of 156 countries.
Where does this data come from?: UNESCO Institute for Statistics, published as Repetition rate in lower secondary general education (all grades), both sexes (%). Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Chad vs Guinea: Repetition rate in lower secondary general education (all grades). Statizoid, drawing on UNESCO Institute for Statistics. Retrieved 31 August 2026, from https://reference.statizoid.com/compare/repetition-rate-in-lower-secondary-general-education-all-grades-both-sexes-percent/chad/guinea/

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About this data

Indicator: Repetition rate in lower secondary general education (all grades), both sexes (%)
Unit: %
Source: UNESCO Institute for Statistics
Licence: CC BY 4.0 (World Bank Open Data)
Coverage: 156 places, 2,040 data points, 1970–2019
Last refreshed: 21 August 2026

Number of repeaters in lower secondary education in a given school year, expressed as a percentage of enrolment in lower secondary education in the previous school year. Divide the number of repeaters in lower secondary education in school year t+1 by the number of pupils from the same cohort enrolled in lower secondary education in the previous school year t.