Cook Islands vs Sri Lanka: Theoretical duration of lower secondary education (years)
Cook Islands
4 years
in 2025
Sri Lanka
4 years
in 2025
Cook Islands rank
18th
Sri Lanka rank
18th
Theoretical duration of lower secondary education (years) over time
- Cook Islands
- Sri Lanka
How they compare
Cook Islands currently reports 4 years against 4 years in Sri Lanka, a difference of 0 years.
Across all 56 years both countries report, Sri Lanka has been ahead every year.
Cook Islands ranks 18th and Sri Lanka ranks 18th of 221 countries.
Sri Lanka has averaged higher in every one of the 6 decades both report.
Head to head by decade
| Decade | Cook Islands | Sri Lanka | Difference | Ahead |
|---|---|---|---|---|
| 1970s | 3 years | 5 years | 2 years | Sri Lanka |
| 1980s | 3 years | 5 years | 2 years | Sri Lanka |
| 1990s | 3.2 years | 4.8 years | 1.6 years | Sri Lanka |
| 2000s | 4 years | 4 years | 0 years | — |
| 2010s | 4 years | 4 years | 0 years | — |
| 2020s | 4 years | 4 years | 0 years | — |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher theoretical duration of lower secondary education, Cook Islands or Sri Lanka?
- Cook Islands, at 4 years against 4 years in Sri Lanka as of 2025.
- What is the difference in theoretical duration of lower secondary education between Cook Islands and Sri Lanka?
- 0 years, with Cook Islands ahead.
- How many years of comparable data are there for Cook Islands and Sri Lanka?
- 56 years are reported by both, from 1970 to 2025.
- How do Cook Islands and Sri Lanka rank globally for theoretical duration of lower secondary education?
- Cook Islands ranks 18th and Sri Lanka ranks 18th of 221 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.
Individual pages
About this data
February 2026 Data Release