How many years of comparable data are there for Niger and Tonga?

28 years are reported by both, from 1994 to 2021.

Where does this data come from?

Statizoid (derived), published as Adjusted net national income (constant 2015 US$), per unit of GDP. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Niger vs Tonga: Adjusted net national income (constant 2015 US$), per unit of GDP

Niger

0.8305 constant 2015 US$ per US$ of GDP

in 2021

Tonga

0.8399 constant 2015 US$ per US$ of GDP

in 2021

Niger rank

31st

Tonga rank

28th

Adjusted net national income (constant 2015 US$), per unit of GDP over time

Niger
Tonga

How they compare

Tonga currently reports 0.8399 constant 2015 US$ per US$ of GDP against 0.8305 constant 2015 US$ per US$ of GDP in Niger, a difference of 0.0094 constant 2015 US$ per US$ of GDP.

The two have swapped places 11 times across 28 shared years of data; in 1994 it was Niger ahead.

Niger ranks 31st and Tonga ranks 28th of 151 countries.

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

Head to head by decade

Decade	Niger	Tonga	Difference	Ahead
1990s	1.81 constant 2015 US$ per US$ of GDP	1.83 constant 2015 US$ per US$ of GDP	0.0193 constant 2015 US$ per US$ of GDP	Tonga
2000s	1.48 constant 2015 US$ per US$ of GDP	1.6 constant 2015 US$ per US$ of GDP	0.1182 constant 2015 US$ per US$ of GDP	Tonga
2010s	0.9297 constant 2015 US$ per US$ of GDP	0.951 constant 2015 US$ per US$ of GDP	0.0213 constant 2015 US$ per US$ of GDP	Tonga
2020s	0.8411 constant 2015 US$ per US$ of GDP	0.9018 constant 2015 US$ per US$ of GDP	0.0607 constant 2015 US$ per US$ of GDP	Tonga

Averages of every year both report within each decade.

Frequently asked questions

Which has higher adjusted net national income (constant 2015 us$), per unit of gdp, Niger or Tonga?: Tonga, at 0.8399 constant 2015 US$ per US$ of GDP against 0.8305 constant 2015 US$ per US$ of GDP in Niger as of 2021.
What is the difference in adjusted net national income (constant 2015 us$), per unit of gdp between Niger and Tonga?: 0.0094 constant 2015 US$ per US$ of GDP, with Tonga ahead.
How many years of comparable data are there for Niger and Tonga?: 28 years are reported by both, from 1994 to 2021.
How do Niger and Tonga rank globally for adjusted net national income (constant 2015 us$), per unit of gdp?: Niger ranks 31st and Tonga ranks 28th of 151 countries.
Where does this data come from?: Statizoid (derived), published as Adjusted net national income (constant 2015 US$), per unit of GDP. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Niger vs Tonga: Adjusted net national income (constant 2015 US$), per unit of GDP. Statizoid, drawing on Statizoid (derived). Retrieved 11 October 2026, from https://economy.statizoid.com/compare/adjusted-net-national-income-constant-2015-us-per-unit-of-gdp/niger/tonga/

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<a href="https://economy.statizoid.com/compare/adjusted-net-national-income-constant-2015-us-per-unit-of-gdp/niger/tonga/">Niger vs Tonga: Adjusted net national income (constant 2015 US$), per unit of GDP</a> — Statizoid

About this data

Indicator: Adjusted net national income (constant 2015 US$), per unit of GDP
Unit: constant 2015 US$ per US$ of GDP
Source: Statizoid (derived)
Licence: Derived by Statizoid from the sources named on the page
Coverage: 187 places, 6,339 data points, 1970–2021
Last refreshed: 30 September 2026

Adjusted net national income (constant 2015 US$) divided by GDP (current US$), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.