Gdoc/Admin

Popular pages

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

14,340 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
A line graph titled "Young Americans are spending much more time alone" shows the relative change in time spent alone by different age groups compared to 2010. The vertical axis represents the percentage change, ranging from -10% to +50%, while the horizontal axis covers the years from 2010 to 2023. 

The red line indicates the trend for people aged 15-29. An annotation notes that in 2019, this age group spent 18% more time alone compared to 2010, which further increased with the COVID-19 pandemic. In 2023, time spent alone by those aged 15-29 was 45% higher than in 2010.

Three other lines, representing the age groups 30-44 years, 45-59 years, and 60+ years, are shown in shades of gray. These lines remain flatter over the same period, but also show increases of 10-20%. 

At the bottom, there is a data source reference: "U.S. Bureau of Labor Statistics (2023)" and a note indicating that activities like sleeping, grooming, and personal care are excluded from the data, with a specific mention that the data for 2020 excludes the period from March 18 to May 9 due to the lockdown.

Young Americans spend much more time alone than they did fifteen years ago

Young Americans spend much more time alone than they did in the past. According to data from the US Bureau of Labor Statistics’ American Time Use Survey, people aged 15–29 spent about 45% more time alone in 2023 than in 2010.

The survey classifies all time spent without anybody physically present as “time spent alone”. This can include time spent talking on the phone or video calls.

Time spent alone among young people increased slowly in the second half of the 2010s and then rose sharply during the COVID-19 pandemic. It hasn’t fallen back to earlier levels since then.

In absolute terms, young people spent around four hours alone per day in 2010. By 2023, that number had grown to six hours per day.

Although all Americans spend more time alone, the increase is much smaller for older age groups. Those aged 30 to 44 spend about 20% more time alone now than in 2010, while for people 45 and older, the increase is about 10%.

While time alone can help with rest and personal reflection, it can also lead to loneliness and declining well-being. As time spent alone has increased, young people’s time with family, and even more so with friends, has decreased.

Explore more research and data on how people spend their time

Continue reading
The image shows a line graph comparing Poland's GDP per capita to the average GDP per capita of the European Union (EU 27) from 2000 to 2023. The vertical axis ranges from $0 to $60,000, while the horizontal axis represents the years, marked from 2000 to 2023. 

A red line represents Poland's GDP per capita, starting at around $21,200 in 2004, the year Poland joined the EU, and increasing to approximately $44,400 by 2023. A blue line depicts the EU average GDP per capita, which trends higher than Poland's throughout the graph. 

A note emphasizes that between 2004 and 2023, Poland's GDP per capita more than doubled, reducing the gap with the EU average. The source of the data is the World Bank, projected for 2025, and the data is expressed in international dollars adjusted to 2021 prices.

Poland’s GDP per capita has more than doubled since it joined the European Union in 2004

In May 2004, ten countries joined the European Union in its largest expansion. These new members entered the EU’s internal market, allowing the free movement of goods, services, capital, and people.

Poland was one of these countries. At the time, its Gross Domestic Product (GDP) per capita stood at $21,200 per year, around half the EU average.

Since then, this gap has narrowed. As the chart shows, Poland’s GDP per capita has more than doubled.

While many factors contributed to this growth, integration into the EU played a role. Since 2004, Poland’s inflation-adjusted exports have more than tripled, with around three-quarters going to other EU countries. This boost to growth is sometimes described as an “EU accession bonus”.

Poland has also been a major beneficiary of EU funding, receiving over €163 billion (net of its own contributions). Most of this money has supported areas such as transport infrastructure, research and development, and energy.

Compare levels of GDP per capita across other countries

Continue reading
A data visualization presents a breakdown of pathogens responsible for diarrheal deaths in children under five years old. It features a title at the top, stating "Which pathogens are responsible for diarrheal deaths in children?" Below the title, there is an explanatory note highlighting that an estimated 580,000 children die annually from diarrheal diseases, with the box sizes representing the proportion of deaths attributed to each pathogen.

The categories are divided into three groups: Viruses, Bacteria, and Protists. 

- In the Viruses section, Rotavirus is the largest box, indicating it causes approximately 210,000 annual deaths (35.7%). Other viruses include Adenovirus (6.3%), Norovirus (6.2%), Sapovirus (3.9%), and Astrovirus (3.0%).
  
- In the Bacteria section, a significant box is allocated to Shigella, which results in 63,000 annual deaths (10.8%). It also includes smaller boxes for Salmonella (1.0%), Campylobacter (1.7%), and E. coli toxin (3.9%).
  
- The Protists category has a box for Cryptosporidium, accounting for 3.4%.

Additionally, there is a gray box labeled "Others & unidentified" that represents 24.1% of deaths but does not specify the pathogens involved.

The data source is attributed to Adam Cohen et al. (2022), and the chart is published by Our World in Data.

Ten pathogens are responsible for three-quarters of diarrheal deaths in children

More than half a million children die from diarrheal diseases each year. This is tragic because many of these deaths could be prevented with the tools we already have.

Just ten pathogens are responsible for three-quarters of all diarrheal deaths in children; these are shown in the chart in red, blue, and gold. The leading cause is rotavirus, which kills over 200,000 children each year. Rotavirus vaccines already exist and are very effective in reducing death rates, but vaccination rates are still lagging in many poorer countries.

Other major killers include Shigella, Cryptosporidium, and E. coli, which can be tackled through better hygiene, clean water, improved sanitation, and new treatments.

These pathogens typically spread through contaminated food and water, respiratory droplets, and close contact with others. Basic tools like clean water and sanitation, access to vaccines, and oral rehydration treatment could go a long way in preventing early death, and give every child the chance to have a healthy, long life.

Explore more writing and data on diarrheal diseases on our dedicated page

Continue reading
A scatter plot titled "Suicide rates tend to be higher among men than women," depicting reported suicide death rates per 100,000 people. The horizontal axis represents female suicide deaths, ranging from 0 to 30, while the vertical axis represents male suicide deaths, also ranging from 0 to 30. 

Each dot represents a country, with specific labels highlighting significant points: Uruguay, South Korea (noted for having male rates twice as high as female rates), the US (with male rates four times higher), Japan, Sweden, and Denmark. The plot features a diagonal line indicating that no countries show higher rates of female suicides than male, as there are no dots below the line. 

The data source is the WHO Mortality Database (2024), and there is a note specifying that the data is an annual estimate for the years 2020 to 2022, depending on data availability for each country.

Suicide rates are higher in men than women

Globally, more than 700,000 people die from suicide every year.

Understanding the factors that increase the risk of suicide can help us provide the most effective interventions and support systems.

One thing we do know is that more men die from suicide than women. In the chart, you can see male suicide rates (on the vertical axis) plotted against female rates. One dot is one country. Since all of the dots lie above the line, male suicide rates were higher in all countries included in this dataset.

The size of this gender gap varies by country. In the United States, rates among men are four times higher than amongst women. In South Korea and Japan, they’re around double. Some countries lie closer to the line, meaning the gap is smaller.

The exact reasons for this gender gap are still debated. Factors could include the lethality of different methods, stigma around seeking help, different social pressures, and alcohol and drug abuse.

Every suicide is a tragedy. However, suicide death rates have declined in many countries, and we know that they can be reduced further with greater understanding and support. If you are dealing with suicidal thoughts, you can receive immediate help by visiting resources such as findahelpline.com.

Read my colleague Saloni Dattani’s article on how suicide statistics can vary across sources

Continue reading
A bar chart depicting the estimated deaths in famines, categorized by continent. The horizontal axis represents decades from the 1870s to the 2020s, while the vertical axis indicates the number of deaths, spanning from 0 to 30 million.

The bars represent different continents with distinct colors: South America is represented in a dark red hue, North America in orange, Africa in purple, Europe in blue, and Asia in green. 

Key trends highlighted in the chart include:
- Until the mid-20th century, famines caused millions and millions of deaths, especially in Asia.
- In recent decades, the death toll from famines has decreased significantly, averaging around one million deaths per decade, particularly in Africa.

The chart includes a source note stating that the data is from the World Peace Foundation (2025), and indicating that the figure for the 2020s is preliminary and only reflects data from 2020 to 2023.

Famines kill far fewer people today than they did in the past, but remain a major threat

Famines are still a major global problem. From 2020 to 2023 alone, they caused over a million deaths.

Yet the long-term trend shows significant progress. In the late 1800s and the first half of the 1900s, it was common for famines to kill over 10 million people per decade. This was true as recently as the 1960s, when China’s Great Leap Forward became the deadliest famine in history.

But as you can see in the chart, that number has dropped sharply, to about one to two million per decade.

This improvement is even more striking given that the world’s population has grown substantially. Despite many more people living on Earth, far fewer die from famines than before.

This progress has resulted from various factors, including increased food production, poverty reduction, fewer conflicts, and more accountable governments.

Learn more about why fewer people die from famines today

Continue reading
A world map highlights regions in Sub-Saharan Africa where malaria was the leading cause of death for children under five years old in 2021. Countries affected are shaded in red against a lighter gray background. A text overlay states that in Nigeria, malaria led to over 190,000 deaths among children under five in 2021, more than any other cause. The data source is identified as IHME, Global Burden of Disease, 2024, with a CC BY license noted at the bottom.

Despite being preventable and treatable, malaria is the leading cause of child mortality in much of Sub-Saharan Africa

In 2021, malaria was the leading cause of death among children under five in more than 20 countries in Sub-Saharan Africa.

In Nigeria, over 125,000 young children died from it — that’s 340 every day, one child around every four minutes. The country accounts for one-third of all under‑5 malaria deaths in the world.

Malaria is both preventable and treatable. But millions of children still lack access to basic protection: bed nets, timely treatment, and safe living conditions. We’ve seen malaria eliminated elsewhere.

The tools exist; the challenge is getting them to those who need them most.

Read more from my colleague Max Roser on why progress is possible — and how each of us can contribute

Continue reading
A line graph showing the estimated number of one-year-olds who have received vaccinations for various diseases from 1980 to 2023. The y-axis represents the number of vaccinations in millions, ranging from 0 to 140 million.

The lines are color-coded: the blue line represents the total number of one-year-olds, while a dark red line indicates the number vaccinated against measles. Additional light gray lines represent vaccinations for diphtheria, tetanus, pertussis, polio, hepatitis B, Haemophilus influenzae b, rubella, and rotavirus.

A consistent rise is observed in all vaccination categories, with the most recent data indicating over a hundred million one-year-olds have received the measles vaccine. 

Data is sourced from the United Nations, World Population Prospects (2024), World Health Organization (WHO), and UNICEF (2024). The visualization is licensed under CC BY and published by Our World in Data.

Over a hundred million infants receive measles vaccines annually, protecting them and communities against a deadly disease

Over 100 million infants are vaccinated against measles every year, which means more than 80% of one-year-olds are protected from this potentially life-threatening disease. This global effort has saved millions of lives.

That scale should be reassuring. Measles vaccines are safe and reduce the risk of infection by over 95%, making them one of our most powerful tools to prevent childhood deaths. Outbreaks have become increasingly rare in many countries, global infant mortality has fallen, and measles vaccination alone is estimated to have saved more than 94 million lives.

But that progress is under threat: vaccination rates have fallen in recent years, as the chart shows, and fewer children are getting the protection they need. When coverage slips, measles spreads rapidly; more children suffer and die from a disease we can easily prevent.

Read my colleague Hannah’s article on the number of lives saved by childhood vaccinations

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 14,340 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 expectancy at birthLong-run estimates collated from multiple sources by Our World in Data

Per capita CO₂ emissionsLong-run estimates from the Global Carbon Budget

GDP per capitaLong-run estimates from the Maddison Project Database

Share of people that are undernourishedFAO

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

Receive our latest work by email.
By subscribing you are agreeing to the terms of our privacy policy.

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