Gdoc/Admin

Popular pages

Research and data to make progress against the world’s largest problems.

14,036 charts across 123 topicsAll free: open access and open source

Our Mission

What do we need to know to make the world a better place?

To make progress against the pressing problems the world faces, we need to be informed by the best research and data.

Our World in Data makes this knowledge accessible and understandable, to empower those working to build a better world.

Read about our mission

We are a non-profit — all our work is free to use and open source. Consider supporting us if you find our work valuable.

Donate to support us
As seen on
Logos of the publications that have used our content. From left to right: Science, Nature, PNAS, BBC, Financial Times, The New York Times, The Guardian, The Atlantic, and The Washington Post

Data Insights

Bite-sized insights on how the world is changing, published every few days.

See all Data Insights
The image presents a line graph illustrating the share of electricity generated from fossil fuels and renewables in the Netherlands from 1985 to 2024. 

The horizontal axis marks the years, starting at 1985 on the left and progressing to 2024 on the right. The vertical axis indicates the percentage of electricity generation, ranging from 0% to 100%. 

A brown line represents fossil fuels, which shows a gradual decline over the years, starting near 90% in 1985 and dropping sharply after 2015, approaching close to 40% by 2024. In contrast, a blue line illustrates renewables, showing a slow increase from nearly 0% in 1985 to a significant rise, crossing the fossil fuel line in 2024 to surpass it. 

The title notes the historic shift in Dutch electricity generation, indicating that for the first time, most electricity now comes from renewable sources. 

Data sources for the graph are attributed to Ember for the year 2025 and the EI Statistical Review of World Energy for 2024. The graph is licensed under CC BY.

Renewables have taken the lead in Dutch electricity production

For the first time, in 2024, more than half of the electricity produced in the Netherlands came from renewable sources, and almost all of it (45%) from solar and wind.

As the chart shows, this has been a sharp and recent shift. Even as recently as 2018, over 80% of Dutch electricity was generated by fossil fuels.

The Dutch government signed a national climate accord in 2019 that introduced more than 600 measures to accelerate the shift to low-carbon power. These included further stimulation of solar and wind energy, a rising carbon tax, and the closure of a major coal plant. A rapid surge in renewable electricity followed, with solar and wind growing from 14% to 45% of the electricity mix.

This transition was developed through negotiations with over 100 organizations, including businesses, unions, government agencies, and NGOs. This collaborative approach reflects the Dutch tradition of polderen, a consensus-driven model in which major decisions are made through dialogue and compromise rather than unilateral decisions from central governments.

This matters because it shows that fast transitions are possible not only through top-down mandates but also through cooperation and shared commitment. That’s an encouraging lesson as countries worldwide seek to move away from fossil fuels.

See how each source contributes to the Dutch electricity mix

Continue reading
The visual displays a stacked area chart titled "Number of European overseas colonies by colonizer," indicating the historical decline in the number of colonies held by European nations. The vertical axis represents the number of colonies, ranging from 0 to 100, while the horizontal axis spans from 1925 to 2022. 

The chart shows that in 1925, there were 97 colonies, predominantly held by France and the United Kingdom. A sudden drop in the number of colonies occurs around the 1960s, correlating with a period of rapid decolonization following World War II. There are annotations highlighting key information: "97 of the countries that are independent today were European colonies in 1925" and an explanation of the rapid decolonization. 

Data source: Bastian Becker (2023). Chart CC BY Our World in Data

A century ago, around half of today’s independent countries were European colonies

Just a century ago, many of today’s independent countries weren’t self-governing at all. They were colonies controlled by European countries from far away.

Modern European colonialism began in the 15th century, when Spain and Portugal established overseas empires. By the early 20th century, it had peaked: the United Kingdom and France dominated, and nearly 100 modern-day countries were under European control, mostly in Africa, Asia, and the Caribbean.

As the chart shows, this changed rapidly after World War II. A wave of decolonization spread across the world, especially in the 1950s and 1960s. Colonies became independent countries, formed their own governments, joined international institutions, and started having their own voice in global decisions.

The decline of colonialism marked one of the biggest political shifts in modern history, from external rule to national sovereignty.

Read more about colonization and state capacity on our dedicated page

Continue reading
The image presents a grid of line graphs displaying the increase in household access to various amenities in the United States from 1860 to 2020. The title at the top states, "What did economic growth mean for US households?" 

In the top left panel, the data on average income, here measured by GDP per capita, tells us that the average American was 13 times poorer in 1860. 

The purple lines represent a very straightforward approach to measuring growth: each line tracks the share of households that have access to one specific good or service. Starting from the top, you see the rising provision of basic infrastructure like running water, flush toilets, and electric power. You can also see the increasing availability of communication technology from the radio to the TV to the Internet to mobile phones. And further down, you see the increasing availability of technologies that reduced the drudgery of work at home — vacuum cleaners, washing machines, dryers, and dishwashers.

Footnotes at the bottom provide data sources, including research by Horace Dediu, Comin, Hobijn, and GDP data from the Maddison Project Database.

Two ways of measuring 160 years of economic growth in the United States

Economic growth is easy to understand: it means that people have access to goods and services of increasing quantity and quality.

What is hard, however, is to measure economic growth. This chart shows two ways of doing this for US growth over the past 160 years.

The purple lines represent a straightforward approach: each line tracks the share of households with access to one specific good or service. Starting from the top, you see the rising provision of basic infrastructure like running water, flush toilets, and electric power. You can also see the increasing availability of communication technology: radios, TVs, the Internet, and mobile phones. And further down, you see the rise of technologies that reduced work at home: vacuum cleaners, washing machines, dryers, and dishwashers.

This approach is very concrete; it shows practical ways in which the production and consumption of specific goods increased over time. The downside is that it only captures a limited number of particular goods. Millions of goods and services are produced and consumed, and most are not recorded with such precision.

A way to measure how people’s access to the full range of goods and services changes is to measure people’s incomes. This way of measuring growth is shown in the top left panel. The data on average income, here measured by GDP per capita, tells us that the average American was 13 times poorer in 1860 than in 2022 (adjusted for inflation).

These two ways of measuring economic growth have pros and cons: one is concrete but not comprehensive, the other is comprehensive but quite abstract. If we want to understand what growth means for our societies, I find it helpful to combine them both.

If you want to know more about this — and see how the inequality of incomes can be factored in — you can read my article: “What is economic growth? And why is it so important?”

Continue reading
This image is a line graph comparing per capita CO2 emissions in China and the United Kingdom from 1990 to 2022. The vertical axis represents emissions in tonnes per person, ranging from 0 to 14 tonnes, while the horizontal axis represents the years from 1990 to 2022.

There are two lines on the graph: one in blue for the United Kingdom and another in red for China. The blue line shows that UK emissions began around 12 tonnes per person in 1990, then displayed slight fluctuations but generally declined over the years, indicating a move away from coal. 

In contrast, the red line for China starts below 2 tonnes per person in 1990 and increases steadily over the years, matching the UK's emissions by 2022. 

Text annotations highlight that in the early 1990s, per capita emissions in the UK were six times those in China and that China's emission growth primarily stemmed from increased energy demand, largely powered by coal.

The data sources for this information are the Global Carbon Budget (2024) and UN World Population Prospects. The note specifies that the data refers to fossil emissions only, excluding land use and international transport. The image is credited under CC BY.

Per capita CO₂ emissions in China now match those in the United Kingdom

When I was born in the 1990s, the average carbon dioxide (CO2) emissions in the United Kingdom were about six times higher than in China, but these trends have converged in my lifetime.

You can see this in the chart: in 2022, China’s per capita emissions matched those in the UK.

Once a country that ran on coal, the UK has closed its last coal plant. This has been the main driver of its emissions decline.

Meanwhile, rapid economic growth, powered mainly by coal, has ramped up emissions in China.

These emission numbers are adjusted for trade. Based on domestic production, China’s per capita emissions are much higher than the UK's. But since China is a net exporter of goods (and emissions) and the UK is a net importer, the gap closes when we adjust for consumption.

These emissions are based on domestic consumption and do not include international aviation or shipping, where Brits are likely to emit more.

There are many ways to compare national contributions to climate change; explore them here

Continue reading
This image presents a horizontal range chart titled "Anti-tobacco measures are expanding, but coverage remains patchy."

It shows the percentage of the world population covered by the World Health Organization's best practices for selected tobacco control policies, with data for 2007 and 2024.

Each policy has a corresponding horizontal bar indicating its coverage.

The chart includes a footnote indicating the reference year for taxation is 2008 and cites the data source as WHO, 2024. The chart is CC BY Our World in Data

Strong anti-tobacco measures are growing, but reach only a minority worldwide

Smokers are about 21 times more likely to die from lung cancer than people who never smoked, and they face increased risks from over a dozen other diseases. I know people who died from smoking: you probably do too.

In 2008, the World Health Organization created a set of tobacco control policies with different tiers, the highest of which are considered “best practices” — they are listed on the chart.

The chart also shows the share of the global population living in countries that had enacted these policies as of 2007 and 2024.

What surprised me is how recent most of these policies still are. In 2007, only a tiny share of the global population benefited from these policies. Since then, coverage has increased across all these measures, but most of them still reach less than half of the world's population.

What is the share of taxes on the retail price of a pack of cigarettes? See the data for each country

Continue reading
A line graph depicting GDP per capita from 1820 to 2022, with the vertical axis representing GDP in international dollars and the horizontal axis showing the years. Multiple colored lines represent different regions: 

- A purple line for "Western offshoots" (United States, Canada, Australia, and New Zealand), showing the highest GDP per capita, peaking just above $60,000 in 2022.
- A dark blue line for "Western Europe," also showing significant growth and stabilizing around $50,000.
- A light blue line for "East Asia," indicating gradual growth.
- An orange line for "Eastern Europe," displaying a more moderate increase.
- A green line for the "Middle East and North Africa," showing slow growth throughout the years.
- A brown line for the "World" that climbs steadily.
- An olive line for "Latin America," with modest growth.
- A purple line for "South and Southeast Asia," showing the lowest GDP per capita.
- A teal line representing "Sub Saharan Africa," showing minimal gains.

Additional information indicates the data is sourced from Bolt and van Zanden's Maddison Project Database, with a note that it is expressed in international dollars based on 2011 prices. The graph is attributed to "Our World in Data" and is labeled with a Creative Commons license (CC BY).

Global inequality is the result of two centuries of uneven economic growth

For most of history, almost everyone everywhere was very poor. Hunger was common, half of the children died, and, as the chart shows, average incomes were low across all regions.

The chart also shows how people’s incomes have changed over the last two centuries. The chart highlights a stark divergence: while average incomes in every region have increased, the pace of this growth has varied enormously. Western Europe and the “Western Offshoots” (like the US and Australia) experienced early and sustained economic growth. Meanwhile, Sub-Saharan Africa and South Asia grew much more slowly.

Two hundred years ago, people in all regions were similarly poor. Today, the average incomes of people in Australia, the US, or Denmark are more than 15 times higher than those in Sub-Saharan Africa.

I wrote an article on how economic growth is possible and why it is important: “What is economic growth?” →

Continue reading
The image presents a line graph illustrating the growth of electric cars in Norway from 2010 to a projected 2024. The title indicates that one-third of cars on the road in Norway are expected to be electric by 2024, with a specific note that electric cars encompass both fully battery-electric and plug-in hybrids, though recent sales predominantly feature fully electric models.

The vertical axis represents the percentage of electric cars, ranging from 0% to 35%. The horizontal axis denotes the years from 2010 to 2024. A bold brown line sharply rises, indicating growth, reaching 32% in 2024. Accompanying annotations highlight that in 2019, the percentage was 12%, and in 2014, it was just 1%. 

Additionally, the graph includes lines representing electric car adoption rates in other countries, specifically Sweden, China, the UK, the USA, Japan, and the global average, shown in lighter shades of gray. 

The data source at the bottom reads: "International Energy Agency. Global EV Outlook 2025." The graph is licensed under Creative Commons Attribution (CC BY).

One-third of cars on the road in Norway are now electric

Norway is leading the way in the transition from petrol to electric cars. Almost every new car sold in Norway is electric. Hardly anyone buys a combustion engine car anymore.

However, data on new car sales doesn’t tell us about the distribution of cars on the road. There is a lag between sales and stocks, because people can hold on to their existing petrol and diesel cars for as much as a decade or more.

But after years of electric cars dominating the market, one-third of cars in use in Norway are now electric. The chart shows this growth.

The share was only 12% five years earlier, which shows that this transition can happen relatively quickly.

As the global leader, Norway’s experiences can help to inform other countries on factors like charging networks, grid management, and the impacts of electric car uptake on emissions and air quality.

See how common electric cars are in other countries across the world

Continue reading

Get Data Insights delivered to your inbox

Receive an email from us when we publish a Data Insight (every few days).

By subscribing you are agreeing to the terms of our privacy policy.

Explore our data

Featured data from our collection of 14,036 interactive charts.

See all our data

What share of children die before their fifth birthday?

What could be more tragic than the death of a young child? Child mortality, the death of children under the age of five, is still extremely common in our world today.

The historical data makes clear that it doesn’t have to be this way: it is possible for societies to protect their children and reduce child mortality to very low rates. For child mortality to reach low levels, many things have to go right at the same time: good healthcare, good nutrition, clean water and sanitation, maternal health, and high living standards. We can, therefore, think of child mortality as a proxy indicator of a country’s living conditions.

The chart shows our long-run data on child mortality, which allows you to see how child mortality has changed in countries around the world.

Explore and learn more about this data
Explore and learn more about this data

Share of population living in extreme povertyWorld Bank

Life expectancyLong-run estimates collated from multiple sources by Our World in Data

CO₂ emissions per capitaLong-run estimates from the Global Carbon Budget

GDP per capitaLong-run estimates from the Maddison Project Database

Share of people who are undernourishedUN FAO

Literacy rateLong-run estimates collated from multiple sources by Our World in Data

Share of the population with access to electricityWorld Bank

Data explorers

See all our Data Explorers

Interactive visualization tools to explore a wide range of related indicators.

Subscribe to our newsletters

All our topics

All our data, research, and writing — topic by topic.

Population and Demographic Change

Health

Energy and Environment

Food and Agriculture

Poverty and Economic Development

Education and Knowledge

Innovation and Technological Change

Living Conditions, Community and Wellbeing

Human Rights and Democracy

Violence and War