15. Why we revised our estimates for 2010
Read how Pew Research Center revised our estimates to reflect methodological advances, incorporate newly available data, and allow comparison across measures in this report.
Numbers, Facts and Trends Shaping Your World
Read how Pew Research Center revised our estimates to reflect methodological advances, incorporate newly available data, and allow comparison across measures in this report.
As the financial divide has grown, a smaller share of Americans now live in middle-class households. Here are key facts about this group.
Many religious “nones,” which include atheists and agnostics, in 22 countries hold religious or spiritual beliefs, such as in an afterlife or something beyond the natural world.
The unauthorized immigrant population in the U.S. grew to 11 million in 2022, but remained below the peak of 12.2 million in 2007.
Singapore is the most religiously diverse country, and Yemen the least, as of 2020. The U.S. ranks first among nations with large populations.
Jews are more likely than other major religious groups to live outside their country of birth, yet they account for just 1% of all global migrants.
The median wealth of immigrant households increased by 42% from December 2019 to December 2021.
Only about a third of the world’s countries practice daylight saving time, and the vast majority of them are in Europe.
The number of international migrants grew to 281 million in 2020; 3.6% of the world’s people lived outside their country of birth that year.
This section describes the methods used to estimate religious composition at the country level, regionally and globally; our procedures for measuring religious groups’ demographic characteristics and their religious “switching” rates; as well as methodological challenges that we considered in some countries. The final section lists the 201 countries and territories that make up each of […]
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