Cardiovascular disease mortality has fallen massively since the 1950s.

This chart shows annual age-standardized death rates from cardiovascular diseases in four countries: the United States, France, the United Kingdom, and Italy.

The decline is substantial. In the United States, the death rate dropped from over 500 per 100,000 people in 1950 to under 150 in 2021 — a four-fold decline. The reduction in France and the United Kingdom was even greater, with death rates falling five-fold.

This progress comes from advancements in medical science, surgeries, emergency care, public health efforts, and dietary changes, improving cardiovascular health.

A dramatic reduction in smoking rates, better screening and monitoring for conditions like high blood pressure, and the development of life-saving treatments such as stents, statins, and clot-busting drugs have all contributed.

Explore trends in cardiovascular mortality in more countries →

In the 1970s, the UN General Assembly adopted a resolution asking developed countries to contribute at least 0.7% of their national income to foreign aid. Most countries accepted this target, except for Switzerland and the United States.

But very few countries have met this target in the fifty years since then. Even today, only a handful of countries do.

Just five countries met this target in 2023: Norway, Luxembourg, Sweden, Germany, and Denmark. You can see them in blue on the map.

Every other developed country gave less than 0.7% of their national income.

Explore more of our new charts on foreign aid: who contributes, and where it goes →

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.

Read more about how scaling up inputs has made AI more capable in our new article by Veronika Samborska →

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 →

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 →

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 →