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

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

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.

Gibraltar vs Iran, Islamic Republic of: Theoretical duration of lower secondary education

Gibraltar

2 years

in 2020

Iran, Islamic Republic of

2 years

in 2020

Gibraltar rank

188th

Iran, Islamic Republic of rank

188th

Theoretical duration of lower secondary education over time

Gibraltar
Iran, Islamic Republic of

How they compare

Gibraltar currently reports 2 years against 2 years in Iran, Islamic Republic of, a difference of 0 years.

The two have swapped places 1 time across 51 shared years of data; in 1970 it was Gibraltar ahead.

Gibraltar ranks 188th and Iran, Islamic Republic of ranks 188th of 209 countries.

Across the 6 decades both report, Gibraltar averaged higher in 3 and Iran, Islamic Republic of in 2.

Head to head by decade

Decade	Gibraltar	Iran, Islamic Republic of	Difference	Ahead
1970s	4 years	3 years	1 years	Gibraltar
1980s	4 years	3 years	1 years	Gibraltar
1990s	3.6 years	3 years	0.6 years	Gibraltar
2000s	2 years	3 years	1 years	Iran, Islamic Republic of
2010s	2.2 years	2.7 years	0.5 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, Gibraltar or Iran, Islamic Republic of?: Gibraltar, 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 Gibraltar and Iran, Islamic Republic of?: 0 years, with Gibraltar ahead.
How many years of comparable data are there for Gibraltar and Iran, Islamic Republic of?: 51 years are reported by both, from 1970 to 2020.
How do Gibraltar and Iran, Islamic Republic of rank globally for theoretical duration of lower secondary education?: Gibraltar 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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Gibraltar vs Iran, Islamic Republic of: Theoretical duration of lower secondary education. Statizoid, drawing on UNESCO Institute for Statistics. Retrieved 31 August 2026, from https://education.statizoid.com/compare/theoretical-duration-of-lower-secondary-education-years/gibraltar/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: 21 August 2026

Number of grades (years) in lower secondary education.