The number of Christian-majority countries fell between 2010 and 2020
Countries that lost their Christian majorities all saw growing percentages of religiously unaffiliated people.
Numbers, Facts and Trends Shaping Your World
Publications
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80 years later, Americans have mixed views on whether use of atomic bombs on Hiroshima, Nagasaki was justified
Today, 35% of Americans say using the atomic bomb on Japan in 1945 was justified, while 31% say it was not justified. A third say they are not sure.
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International adoptions to the U.S. have slowed to a trickle, matching trends in other countries
After peaking in 2004, the annual number of international adoptions to the United States has fallen by 94% as of 2023.
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Canadians’ opinions of the U.S. and its president are at or near historic lows
About a third of Canadians (34%) have a favorable opinion of the United States today. This is down 20 percentage points since last year.
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National Public Opinion Reference Survey (NPORS)
NPORS is an annual survey of U.S. adults conducted by the Pew Research Center used to to produce benchmark estimates for several topics.
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Party Affiliation Fact Sheet (NPORS)
Explore trends in partisan identification among U.S. adults using data from Pew Research Center’s National Public Opinion Reference Survey (NPORS).
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How Pew Research Center Uses Its National Public Opinion Reference Survey (NPORS)
In 2020, Pew Research Center launched a new project called the National Public Opinion Reference Survey (NPORS). NPORS is an annual, cross-sectional survey of U.S. adults. Respondents can answer either by paper or online, and they are selected using address-based sampling from the United States Postal Service’s computerized delivery sequence file.
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Why and how we’re weighting surveys for past presidential vote
This piece explains why, when and how we are weighting our surveys on Americans’ past vote.
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About 1 in 6 U.S. teachers work second jobs
The share of teachers working second jobs outside the classroom did not change much from before the pandemic.
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Google users are less likely to click on links when an AI summary appears in the results
In a March 2025 analysis, Google users who encountered an AI summary were less likely to click on links to other websites than users who did not see one.
