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

Middle income
0.9164 GPIA
in 2019
Tonga
1 GPIA
in 2018
Middle income rank
18th
Tonga rank
18th

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

  • Middle income
  • Tonga
00.250.50.751197519972019

How they compare

Tonga currently reports 1 GPIA against 0.9164 GPIA in Middle income, a difference of 0.0836 GPIA.

That makes Tonga's figure about 1.1 times Middle income's.

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

Middle income ranks 18th and Tonga ranks 18th of 36 groups.

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

Head to head by decade

Decade Middle income Tonga Difference Ahead
1970s 0.6598 GPIA 0.9994 GPIA 0.3396 GPIA Tonga
1990s 0.8007 GPIA 1 GPIA 0.2023 GPIA Tonga
2000s 0.8704 GPIA 1 GPIA 0.132 GPIA Tonga
2010s 0.9045 GPIA 1 GPIA 0.0965 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, Middle income or Tonga?
Tonga, at 1 GPIA against 0.9164 GPIA in Middle income as of 2018.
What is the difference in literacy rate, population 25-64 years, adjusted gender parity index between Middle income and Tonga?
0.0836 GPIA, with Tonga ahead.
How many years of comparable data are there for Middle income and Tonga?
5 years are reported by both, from 1976 to 2018.
How do Middle income and Tonga rank globally for literacy rate, population 25-64 years, adjusted gender parity index?
Middle income ranks 18th and Tonga ranks 18th of 36 groups.
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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Middle income vs Tonga: Literacy rate, population 25-64 years, adjusted gender parity index. Statizoid, drawing on UNESCO Institute for Statistics. Retrieved 28 August 2026, from https://reference.statizoid.com/compare/literacy-rate-population-25-64-years-adjusted-gender-parity-index-gpia/middle-income/tonga/

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<a href="https://reference.statizoid.com/compare/literacy-rate-population-25-64-years-adjusted-gender-parity-index-gpia/middle-income/tonga/">Middle income vs Tonga: Literacy rate, population 25-64 years, adjusted gender parity index</a> — Statizoid

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/