Tonga vs Zambia: Lower secondary school completion rates, adjusted gender parity index
Tonga
1.11 index
in 2025
Zambia
1.1 index
in 2025
Tonga rank
37th
Zambia rank
40th
Lower secondary school completion rates, adjusted gender parity index over time
- Tonga
- Zambia
How they compare
Tonga currently reports 1.11 index against 1.1 index in Zambia, a difference of 0.01 index.
Across all 45 years both countries report, Tonga has been ahead every year.
Tonga ranks 37th and Zambia ranks 40th of 164 countries.
Tonga has averaged higher in every one of the 5 decades both report.
Head to head by decade
| Decade | Tonga | Zambia | Difference | Ahead |
|---|---|---|---|---|
| 1980s | 1.05 index | 0.6212 index | 0.4257 index | Tonga |
| 1990s | 1.08 index | 0.7485 index | 0.3361 index | Tonga |
| 2000s | 1.11 index | 0.8617 index | 0.2502 index | Tonga |
| 2010s | 1.12 index | 0.9932 index | 0.1254 index | Tonga |
| 2020s | 1.11 index | 1.08 index | 0.031 index | Tonga |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher lower secondary school completion rates, adjusted gender parity index, Tonga or Zambia?
- Tonga, at 1.11 index against 1.1 index in Zambia as of 2025.
- What is the difference in lower secondary school completion rates, adjusted gender parity index between Tonga and Zambia?
- 0.01 index, with Tonga ahead.
- How many years of comparable data are there for Tonga and Zambia?
- 45 years are reported by both, from 1981 to 2025.
- How do Tonga and Zambia rank globally for lower secondary school completion rates, adjusted gender parity index?
- Tonga ranks 37th and Zambia ranks 40th of 164 countries.
- Where does this data come from?
- UNESCO Institute for Statistics (2026) – with minor processing by Our World in Data, published as Lower secondary school completion rates, adjusted gender parity index. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
An adjusted gender parity index of 1 indicates equal lower secondary school completion rates between boys and girls. Values below 1 favor boys, and values above 1 favor girls.