The latest survey on religion in the World by WIN/Gallup. In addition to the largely familiar geographic contrasts, the increased religiosity of younger people is of interest:

The relationship between gender, age, income, education and people ́s religiosity reveals interesting trends. Younger people (those under 34) tend to be more religious (about 66% as against about 60% for the other age groups). Those without what is considered an education are the most religious (80%) but religious people are a majority in all educational levels.

Income appears to exert a greater influence – among those with a medium high and high income, where less than 50% say they are religious, against 70% of those with low, medium low and medium income. Likewise, the number of convinced atheists is as high as 22% and 25% among people with medium high and high income but only 6% and 5% among people with low and medium low-income.

World Religions: WIN/Gallup International