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

33 years are reported by both, from 1971 to 2018.

Where does this data come from?

UNESCO Institute for Statistics, published as Repeaters in primary education, all grades, both sexes (number). Statizoid refreshes it automatically from the source and publishes the full history for both places.

Arab World vs Chad: Repeaters in primary education, all grades, both sexes

Arab World

2.67 million number

in 2019

Chad

410,677 number

in 2018

Arab World rank

20th

Chad rank

17th

Repeaters in primary education, all grades, both sexes over time

Arab World
Chad

How they compare

Arab World currently reports 2.67 million number against 410,677 number in Chad, a difference of 2.26 million number.

That makes Arab World's figure about 6.5 times Chad's.

Across all 33 years both countries report, Arab World has been ahead every year.

Arab World ranks 20th and Chad ranks 17th of 42 groups.

Arab World has averaged higher in every one of the 5 decades both report.

Head to head by decade

Decade	Arab World	Chad	Difference	Ahead
1970s	1.99 million number	67,616 number	1.92 million number	Arab World
1980s	2.59 million number	137,590 number	2.46 million number	Arab World
1990s	2.89 million number	193,753 number	2.69 million number	Arab World
2000s	2.86 million number	287,008 number	2.57 million number	Arab World
2010s	2.78 million number	452,969 number	2.33 million number	Arab World

Averages of every year both report within each decade.

Frequently asked questions

Which has higher repeaters in primary education, all grades, both sexes, Arab World or Chad?: Arab World, at 2.67 million number against 410,677 number in Chad as of 2019.
What is the difference in repeaters in primary education, all grades, both sexes between Arab World and Chad?: 2.26 million number, with Arab World ahead.
How many years of comparable data are there for Arab World and Chad?: 33 years are reported by both, from 1971 to 2018.
How do Arab World and Chad rank globally for repeaters in primary education, all grades, both sexes?: Arab World ranks 20th and Chad ranks 17th of 42 groups.
Where does this data come from?: UNESCO Institute for Statistics, published as Repeaters in primary education, all grades, both sexes (number). Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Arab World vs Chad: Repeaters in primary education, all grades, both sexes. Statizoid, drawing on UNESCO Institute for Statistics. Retrieved 28 August 2026, from https://education.statizoid.com/compare/repeaters-in-primary-education-all-grades-both-sexes-number/arab-world/chad/

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<a href="https://education.statizoid.com/compare/repeaters-in-primary-education-all-grades-both-sexes-number/arab-world/chad/">Arab World vs Chad: Repeaters in primary education, all grades, both sexes</a> — Statizoid

About this data

Indicator: Repeaters in primary education, all grades, both sexes (number)
Unit: number
Source: UNESCO Institute for Statistics
Licence: CC BY 4.0 (World Bank Open Data)
Coverage: 234 places, 7,144 data points, 1970–2020
Last refreshed: 21 August 2026

Number of pupils enrolled in the same grade for a second (or further) year.