Adjusted Net National Income per Person in 2021, Measured in Constant 2015 Dollars

A country can report a large gross national income while also using up machinery, buildings, minerals, energy resources, and forests in the process of generating that income. The World Bank’s Adjusted net national income per capita (constant 2015 US$) is designed to show a narrower “income after depletion” concept. It starts with GNI, subtracts consumption of fixed capital and natural-resource depletion, divides by population, and then expresses the result in prices held constant at the 2015 level.

The source extract contains 179 latest non-empty country or economy observations, but they are not all from the same year. For a clean geographic comparison, every statistic and ranking below uses only the 141 observations actually dated 2021. Their median is about $4,182 per person and their unweighted mean is about $10,741. The large gap between those two numbers immediately signals a strongly right-skewed distribution.

What “constant 2015 US$” changes about the question

The price basis is the main reason this indicator deserves to be treated separately from the current-dollar version. “Constant” means the series has been adjusted for price changes over time, and 2015 is the reference year for that adjustment. A 2021 value is therefore not the nominal dollar amount that prevailed in 2021. It is the 2021 level restated using a 2015 price basis, making the series more useful when the purpose is to compare real rather than purely nominal changes.

Constant dollars are not the same as purchasing-power parity. PPP tries to account for differences in price levels across countries, while a constant-price series is primarily about removing price changes across time. A country with a higher value here should not automatically be assumed to offer proportionally greater household purchasing power. Cost of living, distribution, taxes, transfers, and local prices are separate questions.

What adjusted net national income subtracts from GNI

The World Bank defines adjusted net national income as GNI minus consumption of fixed capital and natural-resource depletion. Consumption of fixed capital represents the decline in the value of produced assets such as structures, equipment, and machinery as they are used and age. Natural-resource depletion reflects the economic value associated with using down energy resources, minerals, and forests. Dividing the adjusted total by population produces the per-capita series used here.

That makes the measure different from GDP per capita and from ordinary GNI per capita. GDP focuses on production inside the economy. GNI shifts the focus to income accruing to residents, and adjusted net national income then deducts selected forms of asset consumption and resource depletion. It is still not a comprehensive sustainability index: it does not roll every environmental damage, social outcome, or distributional issue into one score.

The 2021 median is $4,182, far below the mean

Among the 141 same-year observations, the first quartile is about $1,681, the median $4,182, and the third quartile $13,539. The mean is $10,741, more than twice the median. The highest value is roughly $65,458, while the lowest is about $298. A few very high-income economies stretch the upper tail enough that the mean is not a good description of a typical observation.

The largest single band is $2,500–5,000, with 30 observations. 23 are below $1,000, while only 5 reach $50,000 or more. That uneven distribution is why both the map and the ranking chart use logarithmic scaling for display while all calculations continue to use the original dollar values.

Luxembourg, Norway, and Switzerland occupy the top three positions

Luxembourg leads the 2021 comparison at about $65,458 per person in constant 2015 dollars. Norway follows at $63,539, Switzerland at $63,432, the United States at $52,621, and Denmark at $51,392. Singapore, Sweden, Iceland, Ireland, and Finland complete the top ten.

Northern and western Europe are heavily represented near the top, but the group is not exclusively European. The United States and Singapore also rank very high. A high position should not be read as proof that resource depletion is low. The final value combines the starting level of GNI with deductions for fixed-capital consumption and resource depletion, so the result cannot identify which component drove a country’s position without additional data.

The lowest values are concentrated in Sub-Saharan Africa

The Democratic Republic of the Congo is lowest in this same-year set at about $298 per person, followed by Somalia at $306, the Central African Republic at $371, and Madagascar at $376. Timor-Leste, Chad, Mozambique, Niger, Guinea-Bissau, and The Gambia also appear in the bottom ten.

Many of these economies also have low starting levels of national income, so the pattern should not be attributed to depletion alone. Because GNI is the starting point, a low-income economy can end up with a low adjusted value even when resource depletion is not unusually large. To isolate the role of energy, minerals, or forests, the corresponding depletion and resource-rent series need to be examined separately.

Korea is about $25,334, Japan $26,816, and China $7,861

East Asia spans several very different parts of the scale. Japan is about $26,816, Korea $25,334, and China $7,861. Singapore is far higher at $48,027, while Indonesia is $2,924, Viet Nam $2,831, and India $1,708. The region therefore does not form a single income band on the map.

North America also shows a wide spread: the United States is $52,621, Canada $36,665, and Mexico $7,064. Germany is $36,066, France $31,681, Italy $25,952, and the Russian Federation $7,809. Brazil stands at $6,478 and South Africa at $4,954. Large total economies do not necessarily rank as highly on a per-person adjusted-income measure.

The map shows a high-income cluster across northern and western Europe

The clearest geographic cluster is across northern and western Europe. Norway, Sweden, Denmark, Finland, and Iceland all sit in high bands, while Switzerland, the Netherlands, Austria, Germany, and France also show elevated levels. The United States and Canada form another high-income cluster in North America. In East Asia, Japan and Korea sit well above China, Viet Nam, Indonesia, and India, while tiny Singapore is a major high-value outlier that is shown as a point because of its size.

At the lower end, many observations below $1,000 are in Sub-Saharan Africa. Yet the region is not uniform: South Africa is much higher than the bottom group, and North African economies occupy different ranges again. Geographic proximity is therefore not enough to explain the result. The map is most useful for identifying broad clusters and sharp neighboring contrasts, not for assigning one cause to an entire continent.

The number 2015 can mean two different things in this dataset

There is an important source of confusion in this series. In the unit constant 2015 US$, 2015 is a price reference year. Separately, the dataset has an observation-year field, and some economies genuinely have their latest non-empty observation in 2015. Australia, Afghanistan, Nigeria, Thailand, and several island economies are examples. Those rows are not 2021 data merely because the unit uses a 2015 price base.

Of the 179 latest non-empty observations, 141 are dated 2021 and 38 are dated 2015–2020. The older group consists of 29 observations from 2015, one from 2016, two from 2018, two from 2019, and four from 2020. Australia, the United Kingdom, Saudi Arabia, the United Arab Emirates, and other economies are therefore absent from the 2021 ranking rather than being backfilled with older values.

Current-dollar and constant-dollar versions answer different questions

The World Bank publishes both a current-U.S.-dollar version and this constant-2015-dollar version of adjusted net national income per capita. The current-dollar series reflects nominal prices in the observation year and is intuitive for describing that year’s money value. The constant-price series removes price changes over time, which makes it more suitable for analyzing real movements and for comparisons where nominal inflation would otherwise obscure the direction of change.

Neither series is universally “better.” The correct choice depends on the question. For nominal size in a specific year, current dollars may be easier to interpret. For real change across time, the constant-price series is more informative. For cross-country living-cost comparisons, PPP-based measures address a different problem. This article stays with one definition and one same-year slice rather than mixing those concepts.

A high value is not the same as household income or a sustainability score

Adjusted net national income per capita is an economy-wide average. It does not tell us how income is distributed, what the median household earns, how much disposable income remains after taxes and transfers, or how expensive local housing and services are. It also does not automatically measure welfare. A country can rank highly here while still having substantial inequality or high living costs.

The environmental interpretation also has limits. The measure deducts selected natural-resource depletion, but it is not a complete accounting of carbon emissions, air pollution, biodiversity loss, water quality, ecosystem services, or every form of natural-capital change. It is best read as a national-income measure with specific asset and depletion adjustments, not as a single sustainability league table.

Data source and mapping method

The numeric source is World Bank World Development Indicators series NY.ADJ.NNTY.PC.KD. The World Bank describes it as GNI minus consumption of fixed capital and natural-resource depletion, divided by population and expressed in constant 2015 U.S. dollars. Missing 2021 values are left missing rather than estimated or replaced with older observations.

Every ranking, distribution statistic, and table uses the 141 observations whose recorded year is exactly 2021. The world map uses simplified country boundaries and adds points for several small island economies that are not distinct polygons at this scale. The color scale is logarithmic for readability, but the underlying calculations are performed on the original constant-dollar values.

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