September 03, 2024
Four decades ago, when HIV was first identified, it was an invariably fatal disease: nearly 100% of those infected died, typically within a few years.
The virus spread rapidly around the world — especially in Africa, where almost two million were dying every year by the millennium.
Thankfully, medical advances and global public health efforts have entirely changed this course. Modern antiretroviral therapy is very effective in both treating HIV — returning people with HIV to near-normal life expectancy — and preventing the virus from spreading to others.
The chart above shows this impact based on data from UNAIDS. Over a million people's lives are now saved by antiretroviral therapy each year.
Recent medical advances could take this progress even further.
Read more on how antiretroviral therapy has changed the lives of people with HIV →
Today
At what age do women have children?
The chart shows the number of births in the United Kingdom since 1950, broken down by the mother's age. This is based on estimates from the latest UN World Population Prospects report.
You can see that, over time, fewer children are born to women in their teens and twenties. This number has been falling since the 1960s.
Instead, we see a rise in the number of births to women in their thirties.
Explore birth data across other countries →
Yesterday
The vast majority of people in the world — over 96% — live in the country where they were born. Only a small minority are international migrants.
International migrants are people who have lived in a country other than where they were born for more than one year. In contrast, natives live in the country where they were born.
Since 1990, the absolute number of international migrants has risen sharply, but their share of the global population has remained relatively unchanged due to population growth.
This data comes from the United Nations Department of Economic and Social Affairs (UN DESA).
Explore the immigrant population share for all countries →
October 18
The average area burned by wildfires each year has fallen in the last few decades. This is due mainly to changes in land practices, including the intensification of agriculture and less savanna burning.
This chart shows the estimated area burnt by wildfires each year, broken down by land cover type. This data comes from the Global Wildfire Information System.
The area of shrublands and savannas burned each year has decreased since the early 2000s, while the area of forest burned has remained very similar.
Much of this decline has occurred in Africa and, to a lesser extent, in Oceania.
This doesn't mean that weather-related risks of wildfires have declined: warmer and drier conditions increase these risks. And despite a global reduction, countries can experience very large and anomalous years. Last year’s large burn in Canada is a clear example.
This year also looks to be on-track to be the largest wildfire year this century.
Explore wildfire data across the world, updated weekly →
October 17
In 2021, 1.2 million people died from diarrheal diseases. Around 340,000 of these deaths were in children under five years old. This makes diarrheal diseases one of the leading causes of death among people of all ages, but also children specifically.
These estimates come from the Institute for Health Metrics and Evaluation’s Global Burden of Disease study.
Deaths from diarrheal diseases have fallen a lot in recent decades as a result of public health interventions. But more progress is possible.
Diarrheal deaths are preventable because they are primarily caused by pathogens, whose spread can be easily controlled. By increasing global access to clean water and sanitation, oral rehydration therapy, and vaccination, this major cause of death can be reduced substantially.
Explore our full page on diarrheal diseases, with more writing and over 40 interactive charts →
October 16
Around one in three people worldwide — that’s 2.8 billion — could not afford a healthy diet in 2022. This is based on the most recent estimates from the World Bank and the Food and Agriculture Organization of the United Nations.
A “healthy diet” is defined as one that follows nutritional guidelines, making sure that someone has enough variety to meet all of their dietary needs. It is considered unaffordable when the lowest possible cost of the diet, along with essentials like housing and transportation, is higher than what someone earns each day.
In low- to middle-income countries like India or Pakistan and much of Sub-Saharan Africa, more than half of the population struggles to afford a healthy diet, with rates exceeding 90% in the poorest.
Read more about diet affordability →
October 15
Guyana, a small country in South America, has seen the fastest growth in gross domestic product (GDP) per capita in the world over the past decade.
This is illustrated in the chart, which shows GDP per capita for Guyana and the World, based on estimates from the World Bank.
The data is adjusted for inflation, so Guyana’s sharp growth is not due to price changes over time.
A large and sudden expansion in oil production has driven most of this growth. In 2020, Guyana began extracting oil. From 2020 to 2023, the country’s oil production grew 425%, making it a key contributor to global crude oil supply growth.
Over this period, Guyana’s GDP per capita rose from below the global average to well above it.
Read more about economic development and oil production →
October 14
On average, Americans spend about the same amount on food consumed at home as they did in the 1950s. But they spend a lot more in restaurants, cafes, and at work.
The chart shows the average amount of money spent on food, at home and away from home in the United States. This is based on data from the USDA Economic Research Service. It’s adjusted for inflation over time.
Today, the amount spent on food away from home is about the same as what is spent on food at home.
Explore data on food expenditure across the world →
