Daily Data Insights
Bite-sized insights on how the world is changing, published every weekday.
January 21, 2025
Since 2010, the training computation of notable AI systems has doubled every six months
Artificial intelligence has advanced rapidly over the past 15 years, fueled by the success of deep learning.
A key reason for the success of deep learning systems has been their ability to keep improving with a staggering increase in the inputs used to train them — especially computation.
Before deep learning took off around 2010, the amount of computation used to train notable AI systems doubled about every 21 months. But, as you can see in the chart, this has accelerated significantly with the rise of deep learning, now doubling roughly every six months.
As one example of this pace, compared to AlexNet, the system that represented a breakthrough in computer vision in 2012, Google’s system “Gemini 1.0 Ultra” just 11 years later used 100 million times more training computation.
To put this in perspective, training Gemini 1.0 required roughly the same amount of computation as 50,000 high-end graphics cards working nonstop for an entire year.
January 20, 2025
Most migrants stay in the continent where they were born
Moving between continents is less common than moving to another country within the same region. For most people, international migration means crossing a nearby border, rather than a very long distance or even an ocean.
Consider Asia, the world's most populous continent.
When an Asian emigrant leaves their home country, they can either move to another Asian country or head to one of the other five continents.
Data from the United Nations Department of Economic and Social Affairs shows that six out of ten Asian emigrants remain within Asia. In other words, more Asian emigrants move to other Asian countries than to all other continents combined.
European and North American emigrants show an even stronger tendency to stay in their continent, at 70% and 87%, respectively. This share is smaller in Africa and South America, at around half.
While this data aims to include illegal migrants, experts acknowledge the challenges in fully measuring these populations.
Read our full article on how far migrants travel from their home countries →
January 17, 2025
In the last 30 years, almost everybody in Bangladesh gained access to basic electricity
In 1991, fewer than 15% of people in Bangladesh had access to electricity. Thirty years later, access was almost universal.
Over 100 million Bangladeshis have gained access to electricity during this time. This enables them to light their homes, use household appliances, or stay connected through phones and the Internet.
The statistic measures the lowest “tier” of energy access: the capacity for basic lighting and charging a phone for at least four hours a day. But more than half the people in Bangladesh now also have a higher tier of electricity access, which means capacity to power high-load appliances (such as fridges) and electricity for more than eight hours a day.
The UN has set a target to achieve universal access to electricity by 2030. Currently, about 9 in 10 people worldwide have basic access to electricity.
You can explore the progress in other countries in our SDG Tracker here →
January 16, 2025
Global cement production has plateaued over the last decade
Global cement production grew rapidly through the 1980s, 1990s and early 2000s. In the decade from 2003 to 2013 alone, production doubled from 2 to 4 billion tonnes.
But, as you can see in the chart, this growth has stalled in the last 10 years. There has been some variation from year to year, but overall, global production has stayed around 4 billion tonnes. This data comes from the United States Geological Survey (USGS).
China was a significant driver of global growth in the 1990s and 2000s but has also reached a plateau in production. It now produces more than half of the world’s cement.
Cement production makes up around 7% of global CO2 emissions.
Explore global trends in other metals and minerals in our data explorer →
January 15, 2025
Countries differ sharply in how many refugees they host
Some countries take in far more refugees than others relative to their population.
A refugee is defined by the UN as someone needing international protection, who has fled their home country and whose home country’s government cannot or will not protect them.
This chart shows the cumulative number of refugees per 1,000 people in the country where they live as of 2023.
There are huge differences between countries: Lebanon hosts 137 refugees for every 1,000 residents — over four times as many as Germany (31) or Poland (25). Those numbers are still much higher than the Netherlands (13) and France (10), far above the United States at just 1.2 refugees per 1,000 residents.
These differences reflect conflicts in neighboring regions and national policies welcoming or deterring refugees.
Explore the number of refugees per 1,000 people for more destination countries →
January 14, 2025
In many countries, more than half of the population faces poverty in multiple dimensions
The experience of poverty goes far beyond having no or low income. Unfortunately, still in many countries today, a large share of people experience severe poverty in many areas of life, such as health, education, and living standards.
To capture this broader reality, researchers from the Oxford Poverty and Human Development Initiative and the UN Development Programme developed the global Multidimensional Poverty Index. This group of indicators measures poverty across essential areas of well-being, capturing whether people are undernourished, whether they lost a child, and lack access to education or basic facilities like clean water or electricity.
The map shows the share of the population in each country living in multidimensional poverty, highlighting where households face overlapping deprivations.
In countries across South America and some in East Asia, this share is less than 10%. But in many countries in Sub-Saharan Africa, more than half of the people experience these extreme conditions. The share even exceeds 4 in 5 people in Niger (91%), Chad (84%), and the Central African Republic (80%).
These figures are based on data from over 100 countries drawn from household surveys conducted between 2011 and 2023.
Read more on our article: Beyond income: understanding poverty through the Multidimensional Poverty Index →
January 13, 2025
The world has passed “peak child”
The number of children in the world has stopped growing. This moment in time was given the term “peak child” by the late Hans Rosling.
The chart shows the estimated number of children under five years old globally up to 2023, with projections from the United Nations out to 2100. The UN thinks the number of under-5s peaked in 2017.
The chart also shows the number of young people under 15, which peaked in 2021. And the number of under-25s, which may have peaked last year.
“Peak child” is a sign that the world is on course for “peak population”. The UN expects the world population to start falling before the end of the century.
Read more about the key insights from the latest UN World Population Prospects →
January 10, 2025
Men are more likely to smoke than women almost everywhere in the world
Almost one-quarter of adults in the world smoke tobacco. However, there are significant differences by gender.
More than one-third of men smoke, while less than one in ten women do.
Men are more likely to smoke in almost every country in the world. You can see this on the chart, which plots the share of men who smoke versus the share of women. Nearly all countries lie above the diagonal line, which means more men smoke than women.
This data is collated and published by the World Bank. It’s based on adults aged 15 years and older and includes all tobacco products.
Explore all of our data and research on smoking across the world →
January 09, 2025
Childhood cancer deaths in the United States have declined six-fold over the last seventy years
Childhood cancer deaths in the United States have fallen dramatically over time, as shown in the chart. It presents annual cancer death rates in children under five years old.
There has been a six-fold decline since the 1950s.
This progress reflects decades of collaboration between scientists, clinicians, and public health workers.
One major success story has been in treating acute lymphoblastic leukemia, a common form of leukemia in children: researchers identified genetic mutations that caused the disease, making it possible to develop targeted chemotherapy drugs that have greatly improved survival. Surgeries, bone marrow transplants, and other treatments have also played a role.
We’ve also seen big improvements for other blood cancers, such as lymphomas and multiple myeloma, though progress has been slower for cancers of the brain and nervous system.
January 08, 2025
Life expectancy has continued to rise in the longest-lived countries
Record national life expectancies have been climbing for over a century.
In 1840, Swedish women had a life expectancy of 46 years — the highest of any country recorded that year. By 1921, Australia held the record at 63 years.
For most of the 20th century, Iceland, Norway, Australia, and Sweden competed for the top position before being overtaken by Japan in 1984. Hong Kong and Japan have held the records since then.
These countries didn’t merely catch up; they’ve continued to push the limits higher.
Japan added six more years to female life expectancy between 1984 and 2010, rising from 80 to 86 years.
This remarkable rise has resulted from many advances in medicine, public health, and living standards — breaking many predictions of the “limits” of life expectancy.
Read more in our article about the rise of maximum life expectancy →
January 07, 2025
Almost half of people born in Syria have left. Where have they gone?
Since the start of the Syrian civil war in 2011, many people have left the country. By 2020, around 8.5 millions had emigrated, representing nearly half (48%) of all people born in the country.
As you can see on the chart, most Syrian emigrants have stayed close to home. Two-thirds of Syrian emigrants now live in Turkey, Lebanon, or Saudi Arabia, with Turkey alone hosting over 40%.
Political obstacles have made it difficult for Syrian migrants to move beyond neighboring countries and reach Europe. In 2016, the European Union and Turkey made a deal to curb migration by keeping migrants in Turkey in exchange for 6 billion euros in aid.
The Syrian case is part of a larger global pattern: most individuals who leave their country stay in the same continent.
Read our full article on how far migrants travel from their home countries →
January 06, 2025
Since 1960, Singapore's GDP per capita has risen from one-third of that of Western Europe to twice as much
In 1960, Singapore’s GDP per capita — a measure of average income — was a third of the average in Western Europe. It was even lower than Western Europe’s average income in 1900.
Since then, while Western Europe experienced steady growth, Singapore grew even faster. By 1994, it had surpassed Western Europe, and today, its average income is roughly twice as high. This is after adjusting for inflation and differences in living costs between countries.
Singapore became an independent republic in 1965. Key factors in its economic success include anti-corruption policies, investment in education and human capital, and its development as a global financial hub.
Explore how GDP per capita trajectories compare across countries →
January 03, 2025
China has reduced sulphur dioxide emissions by more than two-thirds in the last 15 years
China has dramatically reduced local air pollution levels — particularly in its biggest cities — in the last decade.
One rapidly declining pollutant is sulphur dioxide (SO2), which generates smog and can cause acid rain. Its primary source is coal burning.
In the chart, you can see the annual emissions of SO2 in China. They rose steeply during the 1980s and 1990s. But they peaked in the mid-2000s, and over the last 15 years, they have fallen by more than two-thirds.
Putting emissions limits on coal plants and introducing desulphurization technologies that remove SO2 from smokestacks were critical drivers of this decline.
These are modeled estimates from the Community Emissions Data System (CEDS).
See whether air pollution has increased or decreased in your country →
January 02, 2025
Norway gives more foreign aid per capita than any other OECD country
In 2023, Norwegians gave $1,160 in foreign aid — more than twice the amount contributed by people in other large Western countries.
By comparison, people in countries like the United States and Japan gave much less, at $190 and $155 per person, respectively.
One factor behind Norway’s substantial foreign aid is its sovereign wealth fund, built from oil revenues. The fund is valued at around $1.8 trillion — about the size of the Australian economy — and provides financial resources that few nations can match.
Still, its generosity stands out: Norway also leads in foreign aid as a share of national income.
December 31, 2024
Cholesterol levels have declined among American adults in recent decades
High levels of cholesterol are a risk factor for atherosclerosis and cardiovascular diseases, which can lead to heart attacks and strokes.
As the chart shows, the age-standardized share of American adults with unhealthy cholesterol levels has declined over the past 25 years. Age-standardized means the data accounts for the rising age of the population over time.
Data comes from the National Health and Nutrition Examination Survey, a national study conducted every two years. In this study, blood measurements are taken from thousands of people to monitor these trends.
One important reason for the decline in cholesterol is the use of statins. Statins are prescribed to effectively reduce levels of LDL (“bad”) cholesterol. These reduce the formation of cholesterol-filled plaques in the arteries and, thereby, the rates of heart attacks and strokes.
As the chart shows, statins have become more commonly used among adults eligible to take them.
Along with other medications, surgeries, and public health efforts, they’ve helped turn cardiovascular diseases into more manageable conditions. In the US, the age-standardized death rate from cardiovascular diseases has declined for decades and is almost four times lower today than in 1950.
Explore more data on cardiovascular disease, its risk factors, and treatment →
December 30, 2024
In the past, most people worked in agriculture; in today’s rich countries, only a small share do
For most of human history since the agricultural revolution, the majority of the labor force in countries like France, the United Kingdom, Italy, and the Netherlands worked in agriculture.
However, over the last few centuries, this share has plummeted. Today, less than 10% of the workforce is employed in agriculture, and in many cases, it's just a few percent.
This trend is shown clearly in the chart, which is based on data from the International Labour Organization and historical reconstructions by Broadberry and Gardner (2013) and Herrendorf et al. (2014), as we’ve documented in detail.
The chart also includes the even steeper decline in agricultural employment in China over the last 50 years, as people have shifted to manufacturing and services.
Explore this data on agricultural employment across more countries →
December 27, 2024
In 2023, unemployment in the European Union declined to the lowest point in over three decades
Last year, the European Union's population experienced its lowest unemployment rate in over thirty years.
The chart shows that unemployment rates were above 10% in the mid-1990s and early 2010s. The rate has steadily declined since its peak in 2013, nearly halving over the past ten years.
Unemployment refers to individuals who are available for and actively seeking work but cannot find employment. It differs from economic inactivity, which includes people who are neither working nor actively looking for work.
December 26, 2024
The share of immigrants in high-income countries doubled between 1990 and 2020
In international statistics, immigrants are people who have lived for more than one year in a country other than the one where they were born.
Between 1990 and 2020, the share of immigrants in high-income countries doubled, rising from around 7% to 14%. This means that today, one in seven people in high-income countries was born in a different country.
High-income countries often attract migrants with better living conditions, including higher wages, stable political environments, and better public services. In turn, migration has become a crucial driver of population growth in these countries: without migration, the population of high-income countries would have declined since 2020.
This growth is much quicker than in other parts of the world. In contrast, the global share of migrants increased only slightly, with less than one percentage point.
December 25, 2024
Solar and wind power is growing quickly in Poland, but coal still dominates
The share of electricity produced by solar and wind in Poland almost doubled in just two years. In 2021, these renewable sources produced just 11% of its power; by 2023, this was 21%.
You can see this growth in the chart above, based on electricity data from Ember.
Poland still has one of the most coal-intensive electricity mixes in Europe, with coal producing 61% of its power. The country has committed to moving away from coal in the next few decades; growing solar and wind generation will play a key role in this.
Explore energy sources across the world in our Data Explorer →
December 24, 2024
In some countries, far more people consider friends very important than in others
This chart shows the share of people who consider friendships “very important” in their lives.
There are clear differences between countries: Northern Ireland (70%) and Sweden (65%) rank highest, and the United States (51%) and Indonesia (42%) are near the middle. In comparison, in Peru (17%) and Myanmar (12%), smaller shares of the population say that friendship is very important to them.
These differences suggest that the value people assign to different relationships varies significantly across cultures. In some societies, friendships might hold a central role in everyday life, whereas in others, people might place greater importance on family, work, or personal independence.
It's worth keeping in mind that such surveys don't only capture people's different views on friendship but also how they communicate their views when asked in surveys. For example, in some countries, people might be quicker to call something very important than in others.