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Congo, Democratic Republic of the vs Iran, Islamic Republic of: Theoretical duration of lower secondary education

Congo, Democratic Republic of the
2 years
in 2020
Iran, Islamic Republic of
2 years
in 2020
Congo, Democratic Republic of the rank
188th
Iran, Islamic Republic of rank
188th

Theoretical duration of lower secondary education over time

  • Congo, Democratic Republic of the
  • Iran, Islamic Republic of
0123197019952020

How they compare

Congo, Democratic Republic of the currently reports 2 years against 2 years in Iran, Islamic Republic of, a difference of 0 years.

Across all 51 years both countries report, Iran, Islamic Republic of has been ahead every year.

Congo, Democratic Republic of the ranks 188th and Iran, Islamic Republic of ranks 188th of 209 countries.

Iran, Islamic Republic of has averaged higher in every one of the 6 decades both report.

Head to head by decade

Decade Congo, Democratic Republic of the Iran, Islamic Republic of Difference Ahead
1970s 2 years 3 years 1 years Iran, Islamic Republic of
1980s 2 years 3 years 1 years Iran, Islamic Republic of
1990s 2 years 3 years 1 years Iran, Islamic Republic of
2000s 2 years 3 years 1 years Iran, Islamic Republic of
2010s 2 years 2.7 years 0.7 years Iran, Islamic Republic of
2020s 2 years 2 years 0 years —

Averages of every year both report within each decade.

Frequently asked questions

Which has higher theoretical duration of lower secondary education, Congo, Democratic Republic of the or Iran, Islamic Republic of?
Congo, Democratic Republic of the, at 2 years against 2 years in Iran, Islamic Republic of as of 2020.
What is the difference in theoretical duration of lower secondary education between Congo, Democratic Republic of the and Iran, Islamic Republic of?
0 years, with Congo, Democratic Republic of the ahead.
How many years of comparable data are there for Congo, Democratic Republic of the and Iran, Islamic Republic of?
51 years are reported by both, from 1970 to 2020.
How do Congo, Democratic Republic of the and Iran, Islamic Republic of rank globally for theoretical duration of lower secondary education?
Congo, Democratic Republic of the ranks 188th and Iran, Islamic Republic of ranks 188th of 209 countries.
Where does this data come from?
UNESCO Institute for Statistics, published as Theoretical duration of lower secondary education (years). Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Congo, Democratic Republic of the vs Iran, Islamic Republic of: Theoretical duration of lower secondary education. Statizoid, drawing on UNESCO Institute for Statistics. Retrieved 01 September 2026, from https://education.statizoid.com/compare/theoretical-duration-of-lower-secondary-education-years/congo-dem-rep/iran-islamic-rep/

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About this data

Indicator
Theoretical duration of lower 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

Number of grades (years) in lower secondary education.