How many years of comparable data are there for Angola and Iran, Islamic Republic of?

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

Where does this data come from?

Data API, UN Educational, Scientific and Cultural Organization (UNESCO), published as Secondary education, duration (years). Statizoid refreshes it automatically from the source and publishes the full history for both places.

Angola vs Iran, Islamic Republic of: Secondary education, duration

Angola

6 years

in 2025

Iran, Islamic Republic of

6 years

in 2025

Angola rank

91st

Iran, Islamic Republic of rank

91st

Secondary education, duration over time

Angola
Iran, Islamic Republic of

How they compare

Angola currently reports 6 years against 6 years in Iran, Islamic Republic of, a difference of 0 years.

The two have swapped places 1 time across 56 shared years of data; in 1970 it was Angola ahead.

Angola ranks 91st and Iran, Islamic Republic of ranks 91st of 209 countries.

Across the 6 decades both report, Angola averaged higher in 1 and Iran, Islamic Republic of in 2.

Head to head by decade

Decade	Angola	Iran, Islamic Republic of	Difference	Ahead
1970s	7 years	6.2 years	0.8 years	Angola
1980s	7 years	7 years	0 years	—
1990s	7 years	7 years	0 years	—
2000s	6.7 years	7 years	0.3 years	Iran, Islamic Republic of
2010s	6 years	6.3 years	0.3 years	Iran, Islamic Republic of
2020s	6 years	6 years	0 years	—

Averages of every year both report within each decade.

Frequently asked questions

Which has higher secondary education, duration, Angola or Iran, Islamic Republic of?: Angola, at 6 years against 6 years in Iran, Islamic Republic of as of 2025.
What is the difference in secondary education, duration between Angola and Iran, Islamic Republic of?: 0 years, with Angola ahead.
How many years of comparable data are there for Angola and Iran, Islamic Republic of?: 56 years are reported by both, from 1970 to 2025.
How do Angola and Iran, Islamic Republic of rank globally for secondary education, duration?: Angola ranks 91st and Iran, Islamic Republic of ranks 91st of 209 countries.
Where does this data come from?: Data API, UN Educational, Scientific and Cultural Organization (UNESCO), published as Secondary education, duration (years). Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Angola vs Iran, Islamic Republic of: Secondary education, duration. Statizoid, drawing on Data API, UN Educational, Scientific and Cultural Organization (UNESCO). Retrieved 18 August 2026, from https://education.statizoid.com/compare/secondary-education-duration-years/angola/iran-islamic-rep/

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About this data

Indicator: Secondary education, duration (years)
Unit: years
Source: Data API, UN Educational, Scientific and Cultural Organization (UNESCO)
Licence: CC BY 4.0 (World Bank Open Data)
Coverage: 255 places, 13,986 data points, 1970–2025
Last refreshed: 06 August 2026

Secondary duration refers to the number of grades (years) in secondary school.