Quizmaster's Charts

Throughout written history, Asia has been by far the most populous continent. However, explosive growth in Africa may change that by the end of the 21st century.

The population of the city of Rome fell to remarkably low numbers during the Middle Ages before rebounding in modern times.

India is on pace to pass China as the country with the world's largest population.

After increasing rapidly in the 1980s and 1990s, the incarceration rate in the U.S. has peaked and is now falling.

The city of Seattle now has more residents than the city of Detroit as the economy continues to shift from manufacturing to technology.

Wine production has fallen in France but has increased in the United States.

Murder rates in New York City and Los Angeles have generally trended downwards, while murder rates in Detroit and Chicago have remained stubbornly high.

New York City's murder rate skyrocketed in the late 1960s, stayed high for two decades, but plummeted in the 1990s. Today, New York City is one of the safer large cities in the United States.

Since 1970, American carbon dioxide emissions have remained relatively flat, European emissions have fallen, but Chinese emissions have grown dramatically. Today, Chinese is responsible for more carbon emissions than the United States and European Union combined.

Many American cities saw a decline in population following 1950 as residents moved to the suburbs. Some cities have rebounded. Others have not. Here are a few of the cities whose populations have declined most dramatically.

These three major cities all experienced a population decline at some point in the second half of the 20th century. But, in the early 21st century, their population started to grow again.

After falling sharply in the 1970s, the population of New York City rebounded to reach an all-time high in 2016. Since then, the population has started to decline again.