How many years of comparable data are there for Gambia and Sierra Leone?

11 years are reported by both, from 1960 to 2010.

Where does this data come from?

Robert J. Barro and Jong-Wha Lee: http://www.barrolee.com/, published as Barro-Lee: Average years of secondary schooling, age 15+, total. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Gambia vs Sierra Leone: Barro-Lee: Average years of secondary schooling, age 15+, total

Gambia

1.51

in 2010

Sierra Leone

1.49

in 2010

Gambia rank

116th

Sierra Leone rank

117th

Barro-Lee: Average years of secondary schooling, age 15+, total over time

Gambia
Sierra Leone

How they compare

Gambia currently reports 1.51 against 1.49 in Sierra Leone, a difference of 0.02.

The two have swapped places 1 time across 11 shared years of data; in 1960 it was Sierra Leone ahead.

Gambia ranks 116th and Sierra Leone ranks 117th of 144 countries.

Across the 6 decades both report, Gambia averaged higher in 3 and Sierra Leone in 3.

Head to head by decade

Decade	Gambia	Sierra Leone	Difference	Ahead
1960s	0.14	0.155	0.015	Sierra Leone
1970s	0.245	0.265	0.02	Sierra Leone
1980s	0.41	0.45	0.04	Sierra Leone
1990s	0.735	0.625	0.11	Gambia
2000s	1.16	0.915	0.245	Gambia
2010s	1.51	1.49	0.02	Gambia

Averages of every year both report within each decade.

Frequently asked questions

Which has higher barro-lee: average years of secondary schooling, age 15+, total, Gambia or Sierra Leone?: Gambia, at 1.51 against 1.49 in Sierra Leone as of 2010.
What is the difference in barro-lee: average years of secondary schooling, age 15+, total between Gambia and Sierra Leone?: 0.02, with Gambia ahead.
How many years of comparable data are there for Gambia and Sierra Leone?: 11 years are reported by both, from 1960 to 2010.
How do Gambia and Sierra Leone rank globally for barro-lee: average years of secondary schooling, age 15+, total?: Gambia ranks 116th and Sierra Leone ranks 117th of 144 countries.
Where does this data come from?: Robert J. Barro and Jong-Wha Lee: http://www.barrolee.com/, published as Barro-Lee: Average years of secondary schooling, age 15+, total. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Gambia vs Sierra Leone: Barro-Lee: Average years of secondary schooling, age 15+, total. Statizoid, drawing on Robert J. Barro and Jong-Wha Lee: http://www.barrolee.com/. Retrieved 08 September 2026, from https://education.statizoid.com/compare/barro-lee-average-years-of-secondary-schooling-age-15-total/gambia-the/sierra-leone/

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<a href="https://education.statizoid.com/compare/barro-lee-average-years-of-secondary-schooling-age-15-total/gambia-the/sierra-leone/">Gambia vs Sierra Leone: Barro-Lee: Average years of secondary schooling, age 15+, total</a> — Statizoid

About this data

Indicator: Barro-Lee: Average years of secondary schooling, age 15+, total
Source: Robert J. Barro and Jong-Wha Lee: http://www.barrolee.com/
Licence: CC BY 4.0 (World Bank Open Data)
Coverage: 144 places, 1,584 data points, 1960–2010
Last refreshed: 04 September 2026

Average years of secondary schooling, 15+, total is the average years of secondary education completed among people over age 15.