Since peaking in 1950, the city of Chicago has lost nearly 1 million residents. For a long time, the urban area continued to grow while the city shrank. Now the urban area is shrinking as well.
This chart shows the number of living former presidents at the beginning of every year.
Cars are getting safer. Since peaking in 1937, the rate of people who die as a result of motor vehicle accidents in the United States has declined by 60%.
Fertility rates in France and the United Kingdom tell the stories of their respective countries.
Starting from very high levels, the U.S. fertility rate sank to below replacement levels by 1933. The end of WWII saw a new baby boom, but fertility rates quickly fell again and are now near their lowest levels ever.
Coal production in the U.S. has fallen by large amounts in recent years as the fracking boom has made natural gas more affordable.
Wikipedia's expenses have grown by 69% per year since 2004.
For most of human history, economic growth was small or non-existent. Then the Industrial Revolution happened and everything changed.
The difference between the men's and women's world record times is about 10% at every distance.
The rate of workers who die on the job has steadily decreased over time. However, the vast majority of dangerous jobs are still performed by men.
The percentage of the world's population living in extreme poverty has declined by huge amounts since 1981.
The percentage of working-age Americans receiving Social Security Disability benefits as a percentage of the labor force has increased by a factor of ten since 1960.
Good governance matters. Botswana has become much wealthier while neighboring Zimbabwe has languished.
The percentage of NHL players who are Canadian has fallen by large amounts.
Life expectancy has increased in nearly every country, but the rate of increase has varied by country.
Unemployment rates in Greece have soared to levels far above the United States, France, and Japan.
While sheep still outnumber people 5 to 1, the human population is increasing while the sheep population is falling. In future decades there may be more people in New Zealand than there are sheep.
This chart shows the number of air passengers as a percent of the world population. For example, if the number is 50% that means that the average person in the world flies once every two years.
Both the Republican and Democratic parties have received 40%–60% of the popular vote in nearly every Presidential election since 1860.
The population of Syria decreased for several years as people fled to escape the civil war. It is now growing again.