Primary school life expectancy, adjusted gender parity index in Tonga
Tonga: Primary school life expectancy, adjusted gender parity index was 1.04 index in 2024. ▲ Rising
Primary school life expectancy, adjusted gender parity index in Tonga, 1970–2024
Source: UNESCO Institute for Statistics (2026) – with minor processing by Our World in Data. Measured in index.
Analysis
Tonga recorded 1.04 index for primary school life expectancy, adjusted gender parity index in 2024. That is the highest value across all 49 years on record.
That represents a change of up 0.1% on the previous year and up 0.9% over ten years.
Over the whole period, primary school life expectancy, adjusted gender parity index in Tonga peaked at 1.04 index in 2024 and was at its lowest, 0.9441 index, in 1973.
That places Tonga 16th out of 215 countries with data for 2024, putting it in the top 10%.
The long-run direction has been consistently rising across the 49 years of available data.
Primary school life expectancy, adjusted gender parity index in Tonga, year by year
| Year | index | Change |
|---|---|---|
| 1970 | 0.9645 index | — |
| 1971 | 0.9447 index | -2.0% |
| 1972 | 0.9718 index | +2.9% |
| 1973 | 0.9441 index | -2.9% |
| 1974 | 0.9546 index | +1.1% |
| 1975 | 0.9617 index | +0.7% |
| 1976 | 0.9643 index | +0.3% |
| 1977 | 0.9648 index | +0.1% |
| 1978 | 0.9725 index | +0.8% |
| 1979 | 0.9693 index | -0.3% |
| 1981 | 0.9692 index | -0.0% |
| 1982 | 0.9633 index | -0.6% |
| 1983 | 0.9691 index | +0.6% |
| 1984 | 0.9824 index | +1.4% |
| 1985 | 0.9995 index | +1.7% |
| 1986 | 0.9849 index | -1.5% |
| 1990 | 0.9809 index | -0.4% |
| 1991 | 0.9764 index | -0.5% |
| 1992 | 0.9801 index | +0.4% |
| 1993 | 0.9729 index | -0.7% |
| 1994 | 0.9532 index | -2.0% |
| 1995 | 0.9625 index | +1.0% |
| 1996 | 0.9602 index | -0.2% |
| 1997 | 0.9605 index | +0.0% |
| 1998 | 0.9563 index | -0.4% |
| 1999 | 0.965 index | +0.9% |
| 2000 | 0.9791 index | +1.5% |
| 2001 | 1 index | +2.3% |
| 2002 | 0.9941 index | -0.7% |
| 2003 | 0.983 index | -1.1% |
| 2004 | 0.9889 index | +0.6% |
| 2005 | 0.9923 index | +0.3% |
| 2006 | 0.9891 index | -0.3% |
| 2007 | 0.977 index | -1.2% |
| 2008 | 0.9964 index | +2.0% |
| 2009 | 1.02 index | +2.4% |
| 2010 | 1.01 index | -1.0% |
| 2011 | 1.02 index | +0.6% |
| 2012 | 1.03 index | +0.9% |
| 2013 | 1.04 index | +1.0% |
| 2014 | 1.03 index | -0.8% |
| 2015 | 1.02 index | -1.0% |
| 2018 | 0.9831 index | -3.3% |
| 2019 | 0.9708 index | -1.2% |
| 2020 | 0.9716 index | +0.1% |
| 2021 | 0.9885 index | +1.7% |
| 2022 | 1.02 index | +3.2% |
| 2023 | 1.04 index | +1.5% |
| 2024 | 1.04 index | +0.1% |
Tonga compared with similar countries
- Tonga's 1.04 index is above the median for upper middle income countries, which is 0.9951 index, 1.0× the median. (58 countries reporting)
- Tonga's 1.04 index is above the median for East Asia & Pacific, which is 0.9953 index, 1.0× the median. (34 countries reporting)
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1970s | 0.9612 index | 0.9441 index | 0.9725 index | 10 |
| 1980s | 0.9781 index | 0.9633 index | 0.9995 index | 6 |
| 1990s | 0.9668 index | 0.9532 index | 0.9809 index | 10 |
| 2000s | 0.9921 index | 0.977 index | 1.02 index | 10 |
| 2010s | 1.01 index | 0.9708 index | 1.04 index | 8 |
| 2020s | 1.01 index | 0.9716 index | 1.04 index | 5 |
Countries ranked near Tonga
More health data for Tonga
- Un projection of annual infant deaths, annual growth rate -33.33 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate 2.33 % change on previous year (2090)
- Estimated changes in temperature-related death rates compared to projected death rates 834.5 deaths per 1,000 people (2090)
- Number of infants who die before age 1 2 deaths (2100)
- Neonatal tetanus - number of reported cases, gaps filled 0 (2025)
- Population ages 00-04, female, annual growth rate -1.42 % change on previous year (2025)
- Population ages 00-04, female, per unit of GDP 0 units per US$ of GDP (2025)
- Population ages 00-04, female, per capita 0.0535 units per person (2025)
- Population ages 00-04, male, annual growth rate -1.36 % change on previous year (2025)
- Population ages 00-04, male, per unit of GDP 0 units per US$ of GDP (2025)
Frequently asked questions
- What is primary school life expectancy, adjusted gender parity index in Tonga?
- Primary school life expectancy, adjusted gender parity index in Tonga was 1.04 index in 2024, according to UNESCO Institute for Statistics (2026) – with minor processing by Our World in Data.
- What is the highest primary school life expectancy, adjusted gender parity index recorded in Tonga?
- The highest recorded value was 1.04 index in 2024.
- What is the lowest primary school life expectancy, adjusted gender parity index recorded in Tonga?
- The lowest recorded value was 0.9441 index in 1973.
- How does Tonga rank for primary school life expectancy, adjusted gender parity index?
- Tonga ranks 16th out of 215 countries with data for 2024.
- Is primary school life expectancy, adjusted gender parity index rising or falling in Tonga?
- Over the last ten years it is up 0.9%. The long-run trend across the full record is rising.
- Where does this Tonga data come from?
- The figures come from UNESCO Institute for Statistics (2026) – with minor processing by Our World in Data, published as part of Primary school life expectancy, adjusted gender parity index. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 49 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
An adjusted gender parity index of 1 indicates equality in the expected number of years a child of school entrance age is likely to spend in primary school between boys and girls. Values below 1 favor boys, and above 1 favor girls.