Tonga vs World: Literacy rate, population 25-64 years, adjusted gender parity index

Tonga
1 GPIA
in 2018
World
0.9212 GPIA
in 2019
Tonga rank
18th
World rank
18th

Literacy rate, population 25-64 years, adjusted gender parity index over time

  • Tonga
  • World
00.250.50.751197619972019

How they compare

Tonga currently reports 1 GPIA against 0.9212 GPIA in World, a difference of 0.0788 GPIA.

That makes Tonga's figure about 1.1 times World's.

Across all 5 years both countries report, Tonga has been ahead every year.

Tonga ranks 18th and World ranks 18th of 83 countries.

Tonga has averaged higher in every one of the 4 decades both report.

Head to head by decade

Decade Tonga World Difference Ahead
1970s 0.9994 GPIA 0.7503 GPIA 0.2491 GPIA Tonga
1990s 1 GPIA 0.8378 GPIA 0.1653 GPIA Tonga
2000s 1 GPIA 0.8871 GPIA 0.1153 GPIA Tonga
2010s 1 GPIA 0.9125 GPIA 0.0885 GPIA Tonga

Averages of every year both report within each decade.

Frequently asked questions

Which has higher literacy rate, population 25-64 years, adjusted gender parity index, Tonga or World?
Tonga, at 1 GPIA against 0.9212 GPIA in World as of 2018.
What is the difference in literacy rate, population 25-64 years, adjusted gender parity index between Tonga and World?
0.0788 GPIA, with Tonga ahead.
How many years of comparable data are there for Tonga and World?
5 years are reported by both, from 1976 to 2018.
How do Tonga and World rank globally for literacy rate, population 25-64 years, adjusted gender parity index?
Tonga ranks 18th and World ranks 18th of 83 countries.
Where does this data come from?
UNESCO Institute for Statistics, published as Literacy rate, population 25-64 years, adjusted gender parity index (GPIA). Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Tonga vs World: Literacy rate, population 25-64 years, adjusted gender parity index. Statizoid, drawing on UNESCO Institute for Statistics. Retrieved 19 August 2026, from https://reference.statizoid.com/compare/literacy-rate-population-25-64-years-adjusted-gender-parity-index-gpia/tonga/world/

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About this data

Indicator
Literacy rate, population 25-64 years, adjusted gender parity index (GPIA)
Unit
GPIA
Source
UNESCO Institute for Statistics
Licence
CC BY 4.0 (World Bank Open Data)
Coverage
120 places, 2,155 data points, 1970–2019
Last refreshed

The Adjusted Gender Parity Index (GPIA) is calculated by dividing the female value for the indicator by the male value for the indicator. If the resulting value exceeds 1, the ratio is inverted and subtracted from 2. The adjusted gender parity index is symmetrical around 1 and lies in the range 0-2. An adjusted GPI equal to 1 indicates parity between females and males. In general, a value less than 1 indicates disparity in favor of males and a value greater than 1 indicates disparity in favor of females. For more information, consult the UNESCO Institute for Statistics: http://uis.unesco.org/