SOURCES

Good questions. Real sources.

Each number is tied to an independently published source and a reference period. Browse each measure’s definition and original provider below, then open its statistic for reporting years and historical observations.

Statistics and their sources

Total population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship. The values shown are midyear estimates.

Provider
World Bank · World Development Indicators
Unit
people
Latest reporting year
2025
Original source

Annual population growth rate for year t is the exponential rate of growth of midyear population from year t-1 to t, expressed as a percentage. Population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship.

Provider
World Bank · World Development Indicators
Unit
% per year
Latest reporting year
2025
Original source

Population density is midyear population divided by land area in square kilometers. Population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship--except for refugees not permanently settled in the country of asylum, who are generally considered part of the population of their country of origin. Land area is a country's total area, excluding area under inland water bodies, national claims to continental shelf, and exclusive economic zones. In most cases the definition of inland water bodies includes major rivers and lakes.

Provider
World Bank · World Development Indicators
Unit
people / km² land
Latest reporting year
2023
Original source

Urban population refers to people living in urban areas as defined by national statistical offices. The data are collected and smoothed by United Nations Population Division.

Provider
World Bank · World Development Indicators
Unit
% of population
Latest reporting year
2025
Original source

Gross domestic product is the total income earned through the production of goods and services in an economic territory during an accounting period. It can be measured in three different ways: using either the expenditure approach, the income approach, or the production approach. This indicator is expressed in current prices, meaning no adjustment has been made to account for price changes over time. This indicator is expressed in United States dollars.

Provider
World Bank · World Development Indicators
Unit
current US$
Latest reporting year
2025
Original source

Gross domestic product is the total income earned through the production of goods and services in an economic territory during an accounting period. It can be measured in three different ways: using either the expenditure approach, the income approach, or the production approach. The core indicator has been divided by the general population to achieve a per capita estimate.This indicator is expressed in current prices, meaning no adjustment has been made to account for price changes over time. This indicator is expressed in United States dollars.

Provider
World Bank · World Development Indicators
Unit
current US$ / person
Latest reporting year
2025
Original source

Inflation as measured by the consumer price index reflects the annual percentage change in the cost to the average consumer of acquiring a basket of goods and services that may be fixed or changed at specified intervals, such as yearly.

Provider
World Bank · World Development Indicators
Unit
% per year
Latest reporting year
2025
Original source

Life expectancy at birth indicates the number of years a newborn infant would live if prevailing patterns of mortality at the time of its birth were to stay the same throughout its life.

Provider
World Bank · World Development Indicators
Unit
years
Latest reporting year
2024
Original source

Under-five mortality rate is the probability per 1,000 that a newborn baby will die before reaching age five, if subject to age-specific mortality rates of the specified year.

Provider
World Bank · World Development Indicators
Unit
deaths / 1,000 live births
Latest reporting year
2024
Original source

Level of current health expenditure expressed as a percentage of GDP. Estimates of current health expenditures include healthcare goods and services consumed during each year. This indicator does not include capital health expenditures such as buildings, machinery, IT and stocks of vaccines for emergency or outbreaks.

Provider
World Bank · World Development Indicators
Unit
% of GDP
Latest reporting year
2024
Original source

Forest area (% of land area) is the share of total land area that is under natural or planted stands of trees of at least 5 meters in situ, whether productive or not, and excludes tree stands in agricultural production systems (for example, in fruit plantations and agroforestry systems) and trees in urban parks and gardens.

Provider
World Bank · World Development Indicators
Unit
% of land area
Latest reporting year
2023
Original source

Access to electricity is the percentage of population with access to electricity. Electrification data are collected from industry, national surveys and international sources.

Provider
World Bank · World Development Indicators
Unit
% of population
Latest reporting year
2024
Original source

Renewable energy consumption is the share of renewable energy in total final energy consumption.

Provider
World Bank · World Development Indicators
Unit
% of final energy use
Latest reporting year
2022
Original source

Prevalence of undernourishment is the percentage of the population whose habitual food consumption is insufficient to provide the dietary energy levels that are required to maintain a normal active and healthy life. Data showing as 2.5 may signify a prevalence of undernourishment below 2.5%.

Provider
World Bank · World Development Indicators
Unit
% of population
Latest reporting year
2023
Original source

Cereal yield, measured as kilograms per hectare of harvested land, includes wheat, rice, maize, barley, oats, rye, millet, sorghum, buckwheat, and mixed grains. Production data on cereals relate to crops harvested for dry grain only. Cereal crops harvested for hay or harvested green for food, feed, or silage and those used for grazing are excluded. The FAO allocates production data to the calendar year in which the bulk of the harvest took place. Most of a crop harvested near the end of a year will be used in the following year.

Provider
World Bank · World Development Indicators
Unit
kg / hectare
Latest reporting year
2024
Original source

The percentage of people using at least basic water services. This indicator encompasses both people using basic water services as well as those using safely managed water services. Basic drinking water services is defined as drinking water from an improved source, provided collection time is not more than 30 minutes for a round trip. Improved water sources include piped water, boreholes or tubewells, protected dug wells, protected springs, and packaged or delivered water.

Provider
World Bank · World Development Indicators
Unit
% of population
Latest reporting year
2024
Original source

The percentage of people using drinking water from an improved source that is accessible on premises, available when needed and free from fecal and priority chemical contamination. Improved water sources include piped water, boreholes or tubewells, protected dug wells, protected springs, and packaged or delivered water.

Provider
World Bank · World Development Indicators
Unit
% of population
Latest reporting year
2024
Original source

The percentage of people using at least basic sanitation services, that is, improved sanitation facilities that are not shared with other households. This indicator encompasses both people using basic sanitation services as well as those using safely managed sanitation services. Improved sanitation facilities include flush/pour flush to piped sewer systems, septic tanks or pit latrines; ventilated improved pit latrines, composting toilets or pit latrines with slabs.

Provider
World Bank · World Development Indicators
Unit
% of population
Latest reporting year
2024
Original source

Internet users are individuals who have used the Internet (from any location) in the last 3 months. The Internet can be used via a computer, mobile phone, personal digital assistant, games machine, digital TV etc.

Provider
World Bank · World Development Indicators
Unit
% of population
Latest reporting year
2025
Original source

Adult literacy rate is the percentage of people ages 15 and above who can both read and write with understanding a short simple statement about their everyday life.

Provider
World Bank · World Development Indicators
Unit
% of people aged 15+
Latest reporting year
2024
Original source

The planet behind the data

Earth surface and clouds by Solar System Scope, licensed CC BY 4.0. Night lights use NASA’s 2016 Black Marble, by NASA Earth Observatory / Joshua Stevens, using Suomi NPP VIIRS data from Miguel Román, NASA GSFC. The grayscale composite is resized and given a warm tint for this view. Regional zoom loads more detailed night imagery and daytime tiles from NASA GIBS Blue Marble Next Generation. These are historical composites, not live satellite images. Country boundaries use Natural Earth public-domain geometry. Crimea is displayed within Ukraine’s internationally recognized borders, consistent with UN General Assembly Resolution 68/262. These outlines are for country selection and statistical comparison; they do not depict current territorial control. Flags use the MIT-licensed flag-icons package. Cloud and city-light textures are illustrative composites, not current satellite observations.

Back to Earth