Today
Around 1.5% of the world’s electricity was used for data centers in 2025. People are often surprised by how low this number is.
While data centers are a relatively small share of global electricity demand, this is not true everywhere. You can see the differences across several world regions in the chart.
The United States is home to the largest share of the world’s data centers. In 2025, they consumed around 5% of the country’s electricity.
But demand is even more localized than this. There are numerous states where data centers represent more than 10% of power demand. In Virginia, it’s over a quarter.
Even in Europe, this demand is very concentrated; beneath its 2% figure is Ireland, where data centers consume over 20% of electricity.
This local concentration of demand — combined with the speed at which AI is progressing — puts pressure on grids, even if electricity demand is not overwhelming at the global level.
September 10
In July every year, the World Bank sorts countries into income groups based on their per capita gross national income (GNI) in the previous year.
In this year’s update, China was very close to entering the high-income group: its GNI per person was $14,230; just short of the World Bank’s high-income threshold of $14,375.
The chart puts this in perspective. The bars show GNI per person for countries with at least 25 million people, ordered from poorest to richest.
Beyond income, China is already comparable to high-income countries in many dimensions. Its spending on research and development as a share of GDP, for example, is higher than in many European countries. It’s also a global leader in several technology fields, including clean energy and artificial intelligence.
But in other ways, China is closer to middle-income countries. Its productivity, measured by GDP per hour worked, for example, remains much lower than in high-income countries.
September 8
Economic growth is most important for the world's poorest people, and most of the world’s poorest live on the African continent. Are Africa’s economies growing?
The picture is mixed. In some countries, incomes have unfortunately declined in the last decades. This includes Madagascar, Zimbabwe, and Burundi. I have written about this in my brief explainer on extreme poverty.
In today’s Data Insight, I want to focus on the other side: I want to highlight the African countries that are achieving economic growth. Nine of them are shown in the chart above.
In all nine countries, people’s average incomes have more than doubled since 1990.
This made substantial improvements in living standards possible: the share of people in extreme poverty and the rate of child mortality declined in all nine countries.
September 5
Women’s representation in national politics has increased dramatically in the last century.
But men still hold more parliamentary seats in almost every country. There are five exceptions: Mexico, Cuba, Nicaragua, Bolivia, and Rwanda.
You can see this on the map. Most countries are in brown, meaning they have a higher share of men; in many countries, they make up more than 75% of the seats (shown in darker brown).
Look closely enough, and you can see the five countries in green that have more women.
This data comes from V-Dem and is based on parliamentary seats in 2025. It’s worth noting that members of parliament have varying levels of influence and power across countries.
September 3
In 2024, around 18.5 million people born in India lived abroad. For the world’s most populous country, that’s not a lot: just over 1% of the population. This chart shows where they live, based on estimates from the UN, which compiles data from national censuses and population registers.
Nearly half of all Indians living abroad are in the United Arab Emirates, Saudi Arabia and other Gulf countries — that’s more than the US, UK, and Canada combined.
These figures are stocks, not flows: they record where people are from, not when they crossed a border. Pakistan is the clearest case: the two countries were one territory until 1947, and people kept moving across the new border for decades afterwards, so much of the 1.6 million there reflects migration that happened long ago.
September 1
The United States is home to thousands of data centers. They are part of the infrastructure that powers many digital services, including email, gaming, streaming, social media, and, increasingly, artificial intelligence (AI).
As this chart shows, between 2018 and 2022, spending on building data centers in the US hovered between $500 million and $1 billion per month (when adjusted for inflation).
But since late 2022, large investments in AI have led to a rapid growth in data center construction — both by expanding existing facilities and building new, larger ones.
The latest figures released by the US Census Bureau estimate that $4.4 billion was spent in June 2026 alone — a 5-fold increase compared to November 2022, when ChatGPT was released by OpenAI.
These figures cover privately-funded construction and represent only the money spent on building the actual facilities, including materials and construction labor. They don’t include the cost of IT hardware like servers and storage, which can represent a very large share of total investment.
August 29
Malaria is an infectious disease that kills over 600,000 people a year. Most of them, children.
Its high death toll is at least partly explained by the fact that there are so many infections every year: an estimated 260 to 310 million.
I was curious to know how often people living in the worst-affected areas are infected with malaria. In the chart, you can see estimates of new cases per 100 people across high-burden countries. In recent decades, infection rates have declined but remain very high. There are around 30 new cases per 100 people each year.
It would be tempting to simplify this number and say that 30% of people living in Nigeria are infected each year. But that’s probably far from reality.
This is because the same people are often reinfected. When I looked at the scientific literature, I was surprised by how often. A study focused on children in Uganda found that those without preventative measures were infected around five times per year. Another found that in Burkina Faso, it was up to six times.
So, the reality behind the “30 cases per 100 people” average is probably very skewed. Many — particularly children who have not built up immunity — are infected multiple times per year, while most of the population is not infected at all.
