Data insights
Bite-sized insights on how the world is changing, written by our team.
The modal age at death has been rising
The “modal age at death” is the most common age at which people in a population die. The modal age at death for women in Japan in 2021 was 93. In France, it was 92.
This metric helps us understand trends in longevity at older ages. Unlike life expectancy, it is not affected by infant or child mortality.
You can see that over time, the figure has been rising steadily. In France in 1970, the modal age at death was 84 years in women, but now it is 8 years higher.
Large gains in longevity have occurred even among the elderly.
Japan’s cherry trees have been blossoming earlier due to warmer spring temperatures
The peak flowering of cherry trees in Kyoto, Japan, has been recorded since the ninth century. Yasuyuki Aono and colleagues from the Osaka Prefecture University collated this data from historical diaries and chronicles, indicating the dates on which cherry blossom viewing parties had been held or other observations of peak blossom.
In 2023, the peak cherry blossom happened on 25 March — the earliest date since recording began.
This long-run data is a proxy measure for how the climate has changed. The onset of the cherry blossom is linked with warmer temperatures. The combined effects of urbanization and higher temperatures due to climate change have caused the peak blossom to gradually move earlier in the year since the early 20th century.
Declining child mortality, fast and slow
Two centuries ago, about one in three children in Sweden died before they were five years old, as you can see on the chart.
Since then, the child mortality rate in Sweden has declined to 0.2%.
South Korea achieved a similar reduction much faster. This is often the case: those countries that first achieve an improvement in living conditions often need much longer than some of those countries catching up later — countries that catch up can learn from what worked elsewhere.
A record number of objects went into space in 2023
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2,664 objects were launched into space in 2023. This figure breaks the record set the previous year.
The chart shows that US agencies and companies were responsible for launching 2,166 of these objects; that’s 81% of the global total.
Within American launches, 1,935 objects — 73% of the global total — belonged to Starlink, the constellation of satellites operated by the aerospace company SpaceX.
The rapid growth of the global satellite constellation has the power to help expand Internet connectivity, but also contributes to increasing concerns regarding space debris and the congestion of Earth’s orbital environment.
Indonesia’s shift to cleaner cooking fuels has greatly improved air quality and health
In 2000, less than 10% of the population in Indonesia had access to clean cooking fuels. This is now over 80%, as the chart shows.
Clean cooking fuels are those that, when burned, emit less than the World Health Organization's recommended amounts of air pollutants. They reduce the burden of air pollution — and its health impacts — for the households that use them.
In 2007, the Indonesian government launched a national program to move from kerosene cooking fuels to liquefied petroleum gas.
This shift has greatly reduced particulate pollution and improved health outcomes. Death rates from indoor air pollution have fallen steeply.
Extreme poverty in China has been almost eliminated — first in urban, then in rural regions
In 1981, 97% of people in the Chinese countryside lived in extreme poverty. Even in cities, it was more than 70%.
Since then, large economic growth has made it possible for hundreds of millions of people in China to leave extreme poverty behind, first in cities and then in the countryside.
By 2020, the share of people living in extreme poverty in both urban and rural areas was below 1%.
Solar and wind gain an edge over coal in a number of countries
Solar and wind have surpassed coal as a source of electricity generation in a number of countries, as the chart shows. This marks a substantial shift towards more sustainable sources of energy.
Even in the United States, the world’s third-largest producer of coal electricity, the gap between solar and wind power, and coal is now very small. The adoption of clean energy is accelerating.
Differences in life expectancy across the world are extremely large
People in richer countries tend to live much longer than those in poorer countries.
We can see this in the cross-country life expectancy statistics shown on the chart. In Japan, life expectancy at birth is about 85 years, while in Chad and Nigeria, life expectancy is about 52 years — a gap of over three decades.
Pacemakers are crucial to people with heart rhythm disorders, but their adoption varies widely
Pacemakers are crucial medical devices for people with heart disorders and irregular heartbeats. They provide a steady heart rhythm and help the heart pump blood effectively to the rest of the body.
The chart shows that there are large differences in the rates of pacemaker implantations across countries.
In France and Sweden, over 1,000 per million people each year receive pacemaker implantations. In Egypt and Turkey, that figure is less than 150.